curl --request POST \
  --url https://extraction-api.nanonets.com/api/v1/classify/sync \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form 'categories=[{"name": "Invoice", "description": "Bills and invoices"}, {"name": "Contract", "description": "Legal agreements"}]' \
  --form file='@example-file'

{
  "success": true,
  "message": "<string>",
  "record_id": "<string>",
  "filename": "<string>",
  "status": "queued",
  "result": {
    "total_pages": 0,
    "mode": "page",
    "splits": [
      {
        "category": "<string>",
        "pages": [
          123
        ],
        "segment_key": "<string>",
        "segments": [
          {
            "value": "<string>",
            "pages": [
              123
            ]
          }
        ]
      }
    ]
  },
  "processing_time": 123
}