{
  "template_id": "tmpl_abc123def456",
  "merge_parameters": {
    "first_name": "Jane",
    "last_name": "Doe",
    "account_number": "ACC-9876543",
    "balance": "1250.00",
    "statement_date": "2026-06-12",
    "address": {
      "street": "123 Main St",
      "city": "Springfield",
      "state": "IL",
      "zip": "62701"
    }
  },
  "destinations": [
    {
      "name": "s3",
      "data": {
        "bucket": "my-documents-bucket",
        "key": "statements/jane-doe-2026-06.pdf"
      }
    }
  ]
}