API Oficial (NATIVA) - CTA_URL

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => 'https://{BACKEND_URL}/api/messages/sendCTAURL',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => '',
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS =>'{
  "number": "5511989091838",
  "body": { "text": "Acesse nosso site!" },
  "displayText": "Visitar Site",
  "url": "https://exemplo.com",
  "header": { "type": "text", "text": "Promoção" },
  "footer": { "text": "Válido até 31/12" }
}',
  CURLOPT_HTTPHEADER => array(
    'Content-Type: application/json',
    'Authorization: Bearer seutoken'
  ),
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;