curl --request POST \
  --url https://app.herondata.io/api/end_user_files/{heron_id}/trigger_split \
  --header 'x-api-key: <api-key>'

[
  {
    "bank_statement": null,
    "created": "2023-11-07T05:31:56Z",
    "email": null,
    "file_class": "<string>",
    "file_source_metadata": {},
    "filename": "<string>",
    "heron_id": "<string>",
    "iso_application": {
      "heron_id": "iso_6hBjQT9k6KP2rLCXwjUJff",
      "processing_status": "processed"
    },
    "num_pages": 123,
    "page_classes": {},
    "parent_heron_id": "<string>",
    "parsed_results": [],
    "reference_id": "<string>",
    "renamed_filename": "<string>"
  }
]