درخواست ارسالی:
Array
(
    [merchant_id] => b21d6c3e-cf35-45a9-a138-6379789ec4cc
    [amount] => 500000
    [description] => اعتباریتو
    [callback_url] => http://payment.nafisvam.com/callback.php
    [metadata] => Array
        (
            [mobile] => 09120895032
            [email] => 
            [order_id] => ORD17699274875349
        )

)

پاسخ زرین‌پال:
Array
(
    [data] => Array
        (
            [authority] => A0000000000000000000000000008rmq6rg5
            [fee] => 7500
            [fee_type] => Merchant
            [code] => 100
            [message] => Success
        )

    [errors] => Array
        (
        )

)