curl --request PATCH \
  --url https://api-sandbox.revolv3.com/api/PaymentMethod/{paymentMethodId} \
  --header 'Content-Type: application/json-patch+json' \
  --header 'x-revolv3-token: <api-key>' \
  --data '
{
  "billingAddress": {
    "addressId": null,
    "addressLine1": "100 Main Street",
    "addressLine2": null,
    "city": "Santa Ana",
    "state": "CA",
    "postalCode": "90000",
    "phoneNumber": null,
    "email": null,
    "country": "US"
  },
  "creditCard": {
    "expirationDate": "1035"
  },
  "billingFirstName": "John",
  "billingLastName": null,
  "billingFullName": null
}
'

import requests

url = "https://api-sandbox.revolv3.com/api/PaymentMethod/{paymentMethodId}"

payload = {
    "billingAddress": {
        "addressId": None,
        "addressLine1": "100 Main Street",
        "addressLine2": None,
        "city": "Santa Ana",
        "state": "CA",
        "postalCode": "90000",
        "phoneNumber": None,
        "email": None,
        "country": "US"
    },
    "creditCard": { "expirationDate": "1035" },
    "billingFirstName": "John",
    "billingLastName": None,
    "billingFullName": None
}
headers = {
    "x-revolv3-token": "<api-key>",
    "Content-Type": "application/json-patch+json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {'x-revolv3-token': '<api-key>', 'Content-Type': 'application/json-patch+json'},
  body: JSON.stringify({
    billingAddress: {
      addressId: null,
      addressLine1: '100 Main Street',
      addressLine2: null,
      city: 'Santa Ana',
      state: 'CA',
      postalCode: '90000',
      phoneNumber: null,
      email: null,
      country: 'US'
    },
    creditCard: {expirationDate: '1035'},
    billingFirstName: 'John',
    billingLastName: null,
    billingFullName: null
  })
};

fetch('https://api-sandbox.revolv3.com/api/PaymentMethod/{paymentMethodId}', 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://api-sandbox.revolv3.com/api/PaymentMethod/{paymentMethodId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'billingAddress' => [
        'addressId' => null,
        'addressLine1' => '100 Main Street',
        'addressLine2' => null,
        'city' => 'Santa Ana',
        'state' => 'CA',
        'postalCode' => '90000',
        'phoneNumber' => null,
        'email' => null,
        'country' => 'US'
    ],
    'creditCard' => [
        'expirationDate' => '1035'
    ],
    'billingFirstName' => 'John',
    'billingLastName' => null,
    'billingFullName' => null
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json-patch+json",
    "x-revolv3-token: <api-key>"
  ],
]);

$response = curl_exec($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://api-sandbox.revolv3.com/api/PaymentMethod/{paymentMethodId}"

	payload := strings.NewReader("{\n  \"billingAddress\": {\n    \"addressId\": null,\n    \"addressLine1\": \"100 Main Street\",\n    \"addressLine2\": null,\n    \"city\": \"Santa Ana\",\n    \"state\": \"CA\",\n    \"postalCode\": \"90000\",\n    \"phoneNumber\": null,\n    \"email\": null,\n    \"country\": \"US\"\n  },\n  \"creditCard\": {\n    \"expirationDate\": \"1035\"\n  },\n  \"billingFirstName\": \"John\",\n  \"billingLastName\": null,\n  \"billingFullName\": null\n}")

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

	req.Header.Add("x-revolv3-token", "<api-key>")
	req.Header.Add("Content-Type", "application/json-patch+json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.patch("https://api-sandbox.revolv3.com/api/PaymentMethod/{paymentMethodId}")
  .header("x-revolv3-token", "<api-key>")
  .header("Content-Type", "application/json-patch+json")
  .body("{\n  \"billingAddress\": {\n    \"addressId\": null,\n    \"addressLine1\": \"100 Main Street\",\n    \"addressLine2\": null,\n    \"city\": \"Santa Ana\",\n    \"state\": \"CA\",\n    \"postalCode\": \"90000\",\n    \"phoneNumber\": null,\n    \"email\": null,\n    \"country\": \"US\"\n  },\n  \"creditCard\": {\n    \"expirationDate\": \"1035\"\n  },\n  \"billingFirstName\": \"John\",\n  \"billingLastName\": null,\n  \"billingFullName\": null\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-sandbox.revolv3.com/api/PaymentMethod/{paymentMethodId}")

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

request = Net::HTTP::Patch.new(url)
request["x-revolv3-token"] = '<api-key>'
request["Content-Type"] = 'application/json-patch+json'
request.body = "{\n  \"billingAddress\": {\n    \"addressId\": null,\n    \"addressLine1\": \"100 Main Street\",\n    \"addressLine2\": null,\n    \"city\": \"Santa Ana\",\n    \"state\": \"CA\",\n    \"postalCode\": \"90000\",\n    \"phoneNumber\": null,\n    \"email\": null,\n    \"country\": \"US\"\n  },\n  \"creditCard\": {\n    \"expirationDate\": \"1035\"\n  },\n  \"billingFirstName\": \"John\",\n  \"billingLastName\": null,\n  \"billingFullName\": null\n}"

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

{
  "paymentMethodId": 1,
  "billingAddressId": 1,
  "billingAddress": {
    "addressId": 1,
    "addressLine1": "123 Main",
    "addressLine2": null,
    "city": "Santa Ana",
    "state": "CA",
    "postalCode": "90000",
    "phoneNumber": null,
    "email": null,
    "country": "US"
  },
  "billingFirstName": "John",
  "billingLastName": "Smith",
  "merchantPaymentMethodRefId": "payment-method-ref-id_hgays-213-4rf4",
  "paymentMethodAchDetails": null,
  "paymentMethodCreditCardDetails": {
    "binNumber": "411111",
    "paymentLast4Digit": "1111",
    "paymentExpirationDate": "1025",
    "accountUpdateMessage": null,
    "accountUpdateDateTime": null,
    "accountUpdateCode": null,
    "paymentAccountNumber": null
  }
}

{
  "message": "Unable to perform the request action with provided data."
}

{
  "message": "Attempted to perform an unauthorized operation."
}

{
  "message": "Unable to find an entity with the provided data."
}