درخواست ارسالی:
Array
(
    [merchant_id] => b21d6c3e-cf35-45a9-a138-6379789ec4cc
    [amount] => 5500000
    [description] => تست

    [callback_url] => http://payment.nafisvam.com/callback.php
    [metadata] => Array
        (
            [mobile] => 09120504376
            [email] => mma6022@gmail.com
            [order_id] => ORD17619996267068
        )

)

پاسخ زرین‌پال:
Array
(
    [data] => Array
        (
            [authority] => A000000000000000000000000000g1z652y6
            [fee] => 31000
            [fee_type] => Merchant
            [code] => 100
            [message] => Success
        )

    [errors] => Array
        (
        )

)