CreateOrderRequest

{
    "userId": "usr_1a2b3c4d",
    "items": [
        {
            "productId": "prd_laptop001",
            "quantity": 1,
            "unitPrice": 999.99
        }
    ],
    "shippingAddress": {
        "street": "123 Main St",
        "city": "San Francisco",
        "state": "CA",
        "postalCode": "94102",
        "country": "US"
    }
}