curl --request PUT \
  --url https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}/transactions/{transaction_guid} \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "transaction": {
    "amount": "61.11",
    "category": "Groceries",
    "check_number_string": "6812",
    "currency_code": "USD",
    "description": "Whole foods",
    "id": "transaction-265abee9-889b-af6a-c69b-25157db2bdd9",
    "is_international": false,
    "latitude": -43.2075,
    "localized_description": "This is a localized_description",
    "localized_memo": "This is a localized_memo",
    "longitude": 139.691706,
    "memo": "This is a memo",
    "merchant_category_code": 5411,
    "merchant_guid": "MCH-7ed79542-884d-2b1b-dd74-501c5cc9d25b",
    "merchant_location_guid": "MCL-00024e59-18b5-4d79-b879-2a7896726fea",
    "metadata": "some metadata",
    "posted_at": "2016-10-07T06:00:00.000Z",
    "status": "POSTED",
    "transacted_at": "2016-10-06T13:00:00.000Z",
    "type": "DEBIT"
  }
}
'

import requests

url = "https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}/transactions/{transaction_guid}"

payload = { "transaction": {
        "amount": "61.11",
        "category": "Groceries",
        "check_number_string": "6812",
        "currency_code": "USD",
        "description": "Whole foods",
        "id": "transaction-265abee9-889b-af6a-c69b-25157db2bdd9",
        "is_international": False,
        "latitude": -43.2075,
        "localized_description": "This is a localized_description",
        "localized_memo": "This is a localized_memo",
        "longitude": 139.691706,
        "memo": "This is a memo",
        "merchant_category_code": 5411,
        "merchant_guid": "MCH-7ed79542-884d-2b1b-dd74-501c5cc9d25b",
        "merchant_location_guid": "MCL-00024e59-18b5-4d79-b879-2a7896726fea",
        "metadata": "some metadata",
        "posted_at": "2016-10-07T06:00:00.000Z",
        "status": "POSTED",
        "transacted_at": "2016-10-06T13:00:00.000Z",
        "type": "DEBIT"
    } }
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

response = requests.put(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    transaction: {
      amount: '61.11',
      category: 'Groceries',
      check_number_string: '6812',
      currency_code: 'USD',
      description: 'Whole foods',
      id: 'transaction-265abee9-889b-af6a-c69b-25157db2bdd9',
      is_international: false,
      latitude: -43.2075,
      localized_description: 'This is a localized_description',
      localized_memo: 'This is a localized_memo',
      longitude: 139.691706,
      memo: 'This is a memo',
      merchant_category_code: 5411,
      merchant_guid: 'MCH-7ed79542-884d-2b1b-dd74-501c5cc9d25b',
      merchant_location_guid: 'MCL-00024e59-18b5-4d79-b879-2a7896726fea',
      metadata: 'some metadata',
      posted_at: '2016-10-07T06:00:00.000Z',
      status: 'POSTED',
      transacted_at: '2016-10-06T13:00:00.000Z',
      type: 'DEBIT'
    }
  })
};

fetch('https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}/transactions/{transaction_guid}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}/transactions/{transaction_guid}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'transaction' => [
        'amount' => '61.11',
        'category' => 'Groceries',
        'check_number_string' => '6812',
        'currency_code' => 'USD',
        'description' => 'Whole foods',
        'id' => 'transaction-265abee9-889b-af6a-c69b-25157db2bdd9',
        'is_international' => false,
        'latitude' => -43.2075,
        'localized_description' => 'This is a localized_description',
        'localized_memo' => 'This is a localized_memo',
        'longitude' => 139.691706,
        'memo' => 'This is a memo',
        'merchant_category_code' => 5411,
        'merchant_guid' => 'MCH-7ed79542-884d-2b1b-dd74-501c5cc9d25b',
        'merchant_location_guid' => 'MCL-00024e59-18b5-4d79-b879-2a7896726fea',
        'metadata' => 'some metadata',
        'posted_at' => '2016-10-07T06:00:00.000Z',
        'status' => 'POSTED',
        'transacted_at' => '2016-10-06T13:00:00.000Z',
        'type' => 'DEBIT'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}/transactions/{transaction_guid}"

	payload := strings.NewReader("{\n  \"transaction\": {\n    \"amount\": \"61.11\",\n    \"category\": \"Groceries\",\n    \"check_number_string\": \"6812\",\n    \"currency_code\": \"USD\",\n    \"description\": \"Whole foods\",\n    \"id\": \"transaction-265abee9-889b-af6a-c69b-25157db2bdd9\",\n    \"is_international\": false,\n    \"latitude\": -43.2075,\n    \"localized_description\": \"This is a localized_description\",\n    \"localized_memo\": \"This is a localized_memo\",\n    \"longitude\": 139.691706,\n    \"memo\": \"This is a memo\",\n    \"merchant_category_code\": 5411,\n    \"merchant_guid\": \"MCH-7ed79542-884d-2b1b-dd74-501c5cc9d25b\",\n    \"merchant_location_guid\": \"MCL-00024e59-18b5-4d79-b879-2a7896726fea\",\n    \"metadata\": \"some metadata\",\n    \"posted_at\": \"2016-10-07T06:00:00.000Z\",\n    \"status\": \"POSTED\",\n    \"transacted_at\": \"2016-10-06T13:00:00.000Z\",\n    \"type\": \"DEBIT\"\n  }\n}")

	req, _ := http.NewRequest("PUT", url, payload)

	req.Header.Add("Authorization", "Basic <encoded-value>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.put("https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}/transactions/{transaction_guid}")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"transaction\": {\n    \"amount\": \"61.11\",\n    \"category\": \"Groceries\",\n    \"check_number_string\": \"6812\",\n    \"currency_code\": \"USD\",\n    \"description\": \"Whole foods\",\n    \"id\": \"transaction-265abee9-889b-af6a-c69b-25157db2bdd9\",\n    \"is_international\": false,\n    \"latitude\": -43.2075,\n    \"localized_description\": \"This is a localized_description\",\n    \"localized_memo\": \"This is a localized_memo\",\n    \"longitude\": 139.691706,\n    \"memo\": \"This is a memo\",\n    \"merchant_category_code\": 5411,\n    \"merchant_guid\": \"MCH-7ed79542-884d-2b1b-dd74-501c5cc9d25b\",\n    \"merchant_location_guid\": \"MCL-00024e59-18b5-4d79-b879-2a7896726fea\",\n    \"metadata\": \"some metadata\",\n    \"posted_at\": \"2016-10-07T06:00:00.000Z\",\n    \"status\": \"POSTED\",\n    \"transacted_at\": \"2016-10-06T13:00:00.000Z\",\n    \"type\": \"DEBIT\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}/transactions/{transaction_guid}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"transaction\": {\n    \"amount\": \"61.11\",\n    \"category\": \"Groceries\",\n    \"check_number_string\": \"6812\",\n    \"currency_code\": \"USD\",\n    \"description\": \"Whole foods\",\n    \"id\": \"transaction-265abee9-889b-af6a-c69b-25157db2bdd9\",\n    \"is_international\": false,\n    \"latitude\": -43.2075,\n    \"localized_description\": \"This is a localized_description\",\n    \"localized_memo\": \"This is a localized_memo\",\n    \"longitude\": 139.691706,\n    \"memo\": \"This is a memo\",\n    \"merchant_category_code\": 5411,\n    \"merchant_guid\": \"MCH-7ed79542-884d-2b1b-dd74-501c5cc9d25b\",\n    \"merchant_location_guid\": \"MCL-00024e59-18b5-4d79-b879-2a7896726fea\",\n    \"metadata\": \"some metadata\",\n    \"posted_at\": \"2016-10-07T06:00:00.000Z\",\n    \"status\": \"POSTED\",\n    \"transacted_at\": \"2016-10-06T13:00:00.000Z\",\n    \"type\": \"DEBIT\"\n  }\n}"

response = http.request(request)
puts response.read_body