Add E-Signatures to PHP

<?php
$data = json_decode(file_get_contents('php://input'), true);

$ch = curl_init('https://signb.ee/api/send');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => json_encode($data),
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer ' . getenv('SIGNBEE_API_KEY'),
        'Content-Type: application/json',
    ],
    CURLOPT_RETURNTRANSFER => true,
]);

$response = curl_exec($ch);
curl_close($ch);

header('Content-Type: application/json');
echo $response;