alipaycn - paymentcode

{
    "amount": "1.11",
    "currency": "SGD",
    "payment_method": {
        "type": "alipaycn",
        "alipaycn": {
            "flow": "qrcode",
            "os_type": "ios",
            "is_present": true,
            "payment_code": "284057804613761079"
        }
    },
    "merchant_order_id": "{{$guid}}",
    "description": "acquiring sandbox testing",
    "metadata": {
        "request_id": "{{$guid}}"
    },
    "return_url": "https://127.0.0.1:8080/api/v1/callback"
}