{
  "invoiceNumber": "SYN-001",
  "invoiceDate": "31/10/2026",
  "sellerGstin": "00SYNTHETIC001",
  "sellerName": "Synthetic Seller Ltd",
  "buyerGstin": "00SYNTHETIC002",
  "buyerName": "Synthetic Buyer Ltd",
  "items": [
    {"description":"Synthetic support service","isService":true,"hsnCode":"9983","quantity":2,"unitPrice":1000,"gstRate":18}
  ]
}