curl --request POST \
  --url https://api.example.com/api/v1/sessions/{session_id}/sender-data/bulk \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '[
  {}
]'

{
  "session_id": "<string>",
  "sources_updated": 123,
  "merge_strategy": "<string>",
  "message": "<string>",
  "job_id": "<string>",
  "estimated_completion_time": 123,
  "processing_status": "<string>"
}