curl --request POST \
  --url https://int-api.mx.com/users \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "user": {
    "email": "email@provider.com",
    "id": "My-Unique-ID",
    "is_disabled": false,
    "metadata": "{\\\"type\\\": \\\"individual\\\", \\\"status\\\": \\\"preferred\\\"}"
  }
}
'

import requests

url = "https://int-api.mx.com/users"

payload = { "user": {
        "email": "email@provider.com",
        "id": "My-Unique-ID",
        "is_disabled": False,
        "metadata": "{\\"type\\": \\"individual\\", \\"status\\": \\"preferred\\"}"
    } }
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    user: {
      email: 'email@provider.com',
      id: 'My-Unique-ID',
      is_disabled: false,
      metadata: '{\"type\": \"individual\", \"status\": \"preferred\"}'
    }
  })
};

fetch('https://int-api.mx.com/users', 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",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'user' => [
        'email' => 'email@provider.com',
        'id' => 'My-Unique-ID',
        'is_disabled' => false,
        'metadata' => '{\\"type\\": \\"individual\\", \\"status\\": \\"preferred\\"}'
    ]
  ]),
  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"

	payload := strings.NewReader("{\n  \"user\": {\n    \"email\": \"email@provider.com\",\n    \"id\": \"My-Unique-ID\",\n    \"is_disabled\": false,\n    \"metadata\": \"{\\\\\\\"type\\\\\\\": \\\\\\\"individual\\\\\\\", \\\\\\\"status\\\\\\\": \\\\\\\"preferred\\\\\\\"}\"\n  }\n}")

	req, _ := http.NewRequest("POST", 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.post("https://int-api.mx.com/users")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"user\": {\n    \"email\": \"email@provider.com\",\n    \"id\": \"My-Unique-ID\",\n    \"is_disabled\": false,\n    \"metadata\": \"{\\\\\\\"type\\\\\\\": \\\\\\\"individual\\\\\\\", \\\\\\\"status\\\\\\\": \\\\\\\"preferred\\\\\\\"}\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://int-api.mx.com/users")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"user\": {\n    \"email\": \"email@provider.com\",\n    \"id\": \"My-Unique-ID\",\n    \"is_disabled\": false,\n    \"metadata\": \"{\\\\\\\"type\\\\\\\": \\\\\\\"individual\\\\\\\", \\\\\\\"status\\\\\\\": \\\\\\\"preferred\\\\\\\"}\"\n  }\n}"

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

{
  "user": {
    "email": "email@provider.com",
    "guid": "USR-d74cb14f-fd0a-449f-991b-e0362a63d9c6",
    "id": "My-Unique-ID",
    "is_disabled": false,
    "metadata": "{\\\"first_name\\\": \\\"Steven\\\", \\\"last_name\\\": \\\"Universe\\\"}"
  }
}