{
  "InvoiceId" : 1,
  "CustomerId" : 2,
  "InvoiceDate" : "1230768000000",
  "BillingAddress" : "Theodor-Heuss-Straße 34",
  "BillingPostalCode" : "70174",
  "BillingCity" : "Stuttgart",
  "BillingState" : "Baden-Württemberg",
  "BillingCountry" : "Germany",
  "Total" : 71.61,
  "InvoiceLineItems" : {
                       "1": {
                            "UnitPrice": 0.99,
                            "Quantity": 3,
                            "TrackId": 2,
                            "InvoiceId": 1,
                            "InvoiceLineId": 1
                        },
                        "2": {
                            "UnitPrice": 2.67,
                            "Quantity": 7,
                            "TrackId": 5,
                            "InvoiceId": 1,
                            "InvoiceLineId": 2
                        },
                        "3": {
                            "UnitPrice": 9.99,
                            "Quantity": 5,
                            "TrackId": 3,
                            "InvoiceId": 1,
                            "InvoiceLineId": 3
                        }
   }
}