curl --request POST \
  --url http://api.gu1.ai/entities \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "entityType": "<string>",
  "entityData": {
    "paymentMethod": {
      "type": "<string>",
      "last4": "<string>",
      "brand": "<string>",
      "expiryMonth": "<string>",
      "expiryYear": "<string>",
      "holderName": "<string>",
      "issuerCountry": "<string>",
      "bin": "<string>",
      "pixKey": "<string>",
      "pixKeyType": "<string>"
    }
  },
  "relationships": [
    {}
  ]
}
'

import requests

url = "http://api.gu1.ai/entities"

payload = {
    "entityType": "<string>",
    "entityData": { "paymentMethod": {
            "type": "<string>",
            "last4": "<string>",
            "brand": "<string>",
            "expiryMonth": "<string>",
            "expiryYear": "<string>",
            "holderName": "<string>",
            "issuerCountry": "<string>",
            "bin": "<string>",
            "pixKey": "<string>",
            "pixKeyType": "<string>"
        } },
    "relationships": [{}]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    entityType: '<string>',
    entityData: {
      paymentMethod: {
        type: '<string>',
        last4: '<string>',
        brand: '<string>',
        expiryMonth: '<string>',
        expiryYear: '<string>',
        holderName: '<string>',
        issuerCountry: '<string>',
        bin: '<string>',
        pixKey: '<string>',
        pixKeyType: '<string>'
      }
    },
    relationships: [{}]
  })
};

fetch('http://api.gu1.ai/entities', 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 => "http://api.gu1.ai/entities",
  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([
    'entityType' => '<string>',
    'entityData' => [
        'paymentMethod' => [
                'type' => '<string>',
                'last4' => '<string>',
                'brand' => '<string>',
                'expiryMonth' => '<string>',
                'expiryYear' => '<string>',
                'holderName' => '<string>',
                'issuerCountry' => '<string>',
                'bin' => '<string>',
                'pixKey' => '<string>',
                'pixKeyType' => '<string>'
        ]
    ],
    'relationships' => [
        [
                
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "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 := "http://api.gu1.ai/entities"

	payload := strings.NewReader("{\n  \"entityType\": \"<string>\",\n  \"entityData\": {\n    \"paymentMethod\": {\n      \"type\": \"<string>\",\n      \"last4\": \"<string>\",\n      \"brand\": \"<string>\",\n      \"expiryMonth\": \"<string>\",\n      \"expiryYear\": \"<string>\",\n      \"holderName\": \"<string>\",\n      \"issuerCountry\": \"<string>\",\n      \"bin\": \"<string>\",\n      \"pixKey\": \"<string>\",\n      \"pixKeyType\": \"<string>\"\n    }\n  },\n  \"relationships\": [\n    {}\n  ]\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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("http://api.gu1.ai/entities")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"entityType\": \"<string>\",\n  \"entityData\": {\n    \"paymentMethod\": {\n      \"type\": \"<string>\",\n      \"last4\": \"<string>\",\n      \"brand\": \"<string>\",\n      \"expiryMonth\": \"<string>\",\n      \"expiryYear\": \"<string>\",\n      \"holderName\": \"<string>\",\n      \"issuerCountry\": \"<string>\",\n      \"bin\": \"<string>\",\n      \"pixKey\": \"<string>\",\n      \"pixKeyType\": \"<string>\"\n    }\n  },\n  \"relationships\": [\n    {}\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("http://api.gu1.ai/entities")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"entityType\": \"<string>\",\n  \"entityData\": {\n    \"paymentMethod\": {\n      \"type\": \"<string>\",\n      \"last4\": \"<string>\",\n      \"brand\": \"<string>\",\n      \"expiryMonth\": \"<string>\",\n      \"expiryYear\": \"<string>\",\n      \"holderName\": \"<string>\",\n      \"issuerCountry\": \"<string>\",\n      \"bin\": \"<string>\",\n      \"pixKey\": \"<string>\",\n      \"pixKeyType\": \"<string>\"\n    }\n  },\n  \"relationships\": [\n    {}\n  ]\n}"

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

{
  "success": true,
  "id": "<string>",
  "entityType": "<string>",
  "entityData": {},
  "createdAt": "<string>"
}