$ch = curl_init("https://enigmaproxy.net/api/customer/proxy");

curl_setopt_array($ch, [
  CURLOPT_POST => true,
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer YOUR_API_KEY",
    "Content-Type: application/json"
  ],
  CURLOPT_POSTFIELDS => json_encode([
    "packageId" => "pkg_123456",
    "protocol" => "http",
    "country" => "us",
    "session" => true,
    "qty" => 3
  ]),
  CURLOPT_RETURNTRANSFER => true
]);

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