{
  "seller": { "name": "Acme Studio" },
  "customer": { "name": "Northstar Co." },
  "invoice": { "number": "DEMO-0042", "date": "2026-09-23", "total": "EUR 299.00" },
  "items": [
    { "description": "Template design", "quantity": 1, "amount": "EUR 199.00" },
    { "description": "Integration review", "quantity": 2, "amount": "EUR 100.00" }
  ]
}