CheckStandV2Request

{
    "merNo": 840698790,
    "merOrderNo": "V2_CS_MD5_1778321738524",
    "currencyCode": "USD",
    "sourceAmount": "100.00",
    "returnUrl": "https://www.example.com/return",
    "notifyUrl": "https://www.example.com/notify",
    "paymentMode": "BOOST",
    "sign": "5e3f8c2a9b1d7e6f4a8c2d1e5f3b9a7c",
    "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
    "ipAddress": "127.0.0.1",
    "userId": "string",
    "email": "test@example.com",
    "productInfoList": [
        {
            "sku": "PROD001",
            "productName": "Test Product",
            "price": "100.00",
            "quantity": "1"
        }
    ],
    "version": "V4.0.0",
    "paymentType": 0
}