curl --request POST \
  --url https://api.example.com/api/v1/sessions/{session_id}/upload/excel \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form file='@example-file' \
  --form 'sheet_config=<string>' \
  --form has_header=true \
  --form update_sender_data=true

{
  "session_id": "<string>",
  "status": "<string>",
  "leads_queued": 123,
  "sender_data_sources": 123,
  "file_info": {},
  "message": "<string>",
  "dataset_id": "<string>",
  "quota_info": {},
  "job_id": "<string>",
  "estimated_completion_time": 123,
  "processing_status": "<string>"
}