طلب التنسيق

$data = json_encode($data);
$sign = md5(base64_encode($data) . $API_KEY);

$sign = md5(base64_encode('') . $API_KEY);

curl https://api.cryptomus.com/v1/payment/services \
  -X POST \
  -H 'user_id: 8b03432e-385b-4670-8d06-064591096795' \
  -H 'sign: f80fa426a89eb62bd53997326865d850' \
  -H 'Content-Type: application/json' \
  -d '{}'