{
  "request": {
    "merchantId": "1234567890",
    "merchantSiteId": "987654",
    "clientRequestId": "REQ-2026-05-24-0001",
    "clientUniqueId": "ORDER-INV-100123",
    "currency": "USD",
    "amount": "49.99",
    "userTokenId": "user_98765",
    "items": [
      { "name": "Pro Subscription - Monthly", "price": "49.99", "quantity": 1 }
    ],
    "billingAddress": {
      "firstName": "Alex",
      "lastName": "Doe",
      "address": "1 Market St",
      "city": "San Francisco",
      "zip": "94105",
      "country": "US",
      "email": "alex@example.com",
      "phone": "+14155550123"
    },
    "deviceDetails": {
      "ipAddress": "203.0.113.10",
      "deviceType": "DESKTOP",
      "browser": "Chrome 124.0"
    },
    "urlDetails": {
      "successUrl": "https://merchant.example.com/checkout/success",
      "failureUrl": "https://merchant.example.com/checkout/failure",
      "notificationUrl": "https://merchant.example.com/webhooks/nuvei"
    },
    "timeStamp": "20260524123045",
    "checksum": "f2b8a4c0e9d1...redacted...3b6"
  },
  "response": {
    "orderId": "412345678",
    "sessionToken": "5d2c19f0-3a90-4f4f-8c1e-4d4a8c3b9c11",
    "clientRequestId": "REQ-2026-05-24-0001",
    "internalRequestId": 1789456321,
    "status": "SUCCESS",
    "errCode": 0,
    "reason": "",
    "merchantId": "1234567890",
    "merchantSiteId": "987654",
    "version": "1.0",
    "userTokenId": "user_98765"
  }
}