{
  "partnerId": "partner-123",
  "partnerSecret": "your-shared-secret",
  "clientId": "device-session-abc123",
  "sentAt": 1718000000000,
  "type": "track",
  "event": "complete_transaction",
  "context": {
    "name": "simon.js",
    "version": "2.0.0",
    "url": "https://example.com/checkout/confirmation",
    "userAgent": "Mozilla/5.0"
  },
  "userId": "user-456",
  "properties": {
    "transactionId": "order-789",
    "revenue": 119.96,
    "tax": 9.60,
    "shipping": 4.99,
    "promotion": "SUMMER20",
    "cartItems": [
      {
        "productId": "sku-001",
        "productName": "Blue Widget",
        "price": 29.99,
        "quantity": 2,
        "brand": "Acme",
        "category": "Widgets",
        "color": "Blue"
      },
      {
        "productId": "sku-002",
        "productName": "Red Gadget",
        "price": 59.98,
        "quantity": 1,
        "brand": "Acme",
        "category": "Gadgets",
        "color": "Red"
      }
    ]
  }
}