{
  "summary": "Create or update a transaction with tax calculation",
  "description": "Example request body for creating/updating a transaction to calculate sales tax",
  "value": {
    "id": "txn_2024_001",
    "currency": "usd",
    "accountingTime": "2024-01-15T10:00:00Z",
    "lineItems": [
      {
        "id": "line_001",
        "productExternalId": "prod_saas_monthly",
        "amount": 10000
      }
    ],
    "customer": {
      "id": "cust_123",
      "name": "Acme Corp",
      "address": {
        "line1": "123 Main St",
        "city": "San Francisco",
        "state": "CA",
        "zip": "94105",
        "country": "US"
      }
    }
  }
}