curl --request POST \
  --url https://app.herondata.io/api/integrations/pdfs/{heron_id}/update_currency \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "currency": "EUR"
}
'

{
  "ok": true,
  "pdf": {
    "account_id": "checking_account_202348",
    "created": "2025-12-12T10:00:53.668689",
    "currency": "USD",
    "end_user": {
      "heron_id": "eus_7LXGsUNgVvLQBdN6AriatL"
    },
    "filename": "my-favourite.pdf",
    "heron_id": "pdf_mxjcqdyUuUv8yJXmCBbYp6",
    "is_image_based": true,
    "last_updated": "2025-12-12T10:00:53.668754",
    "notes": "failed to send to external OCR provider",
    "parsing_version": "<string>",
    "reference_id": "my-favourite-pdf",
    "statements": [
      {
        "exclude": true,
        "invalid_transaction_partials": [
          {
            "amount": 123,
            "balance": 123,
            "bounds": {
              "page": 123,
              "x_max": 123,
              "x_min": 123,
              "y_max": 123,
              "y_min": 123
            },
            "currency": "<string>",
            "description": "<string>",
            "ocr_suspect": true,
            "reference_id": "<string>",
            "timestamp": "2023-11-07T05:31:56Z",
            "transaction_code": "<string>"
          }
        ],
        "summary": {
          "end_balance": 123,
          "num_credits": 123,
          "num_debits": 123,
          "num_transactions": 123,
          "reconciled": true,
          "start_balance": 123,
          "total_credits": 123,
          "total_debits": 123,
          "account_number": "<string>",
          "account_title": "<string>",
          "bank_name": "<string>",
          "company": "<string>",
          "currency": "<string>",
          "fraud_reasons": [
            "<string>"
          ],
          "fraud_score": 123,
          "is_business_account": true,
          "is_ocr": true,
          "max_resolution": 123,
          "min_resolution": 123,
          "statement_end_date": "2023-11-07T05:31:56Z",
          "statement_start_date": "2023-11-07T05:31:56Z",
          "unreconciled_end_balance": 123,
          "web_report": true
        },
        "transaction_partials": [
          {
            "amount": 123,
            "description": "<string>",
            "timestamp": "2023-11-07T05:31:56Z",
            "balance": 123,
            "bounds": {
              "page": 123,
              "x_max": 123,
              "x_min": 123,
              "y_max": 123,
              "y_min": 123
            },
            "currency": "<string>",
            "ocr_suspect": true,
            "reference_id": "<string>",
            "transaction_code": "<string>"
          }
        ]
      }
    ],
    "status": "processed"
  },
  "request_id": "<string>"
}