curl --request POST \
  --url https://api.example.com/v1/batches \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "input_file_id": "<string>",
  "endpoint": "/v1/chat/completions",
  "completion_window": "<string>",
  "metadata": {}
}
'

{
  "id": "<string>",
  "object": "<string>",
  "endpoint": "<string>",
  "input_file_id": "<string>",
  "completion_window": "<string>",
  "status": "<string>",
  "created_at": 123,
  "expires_at": 123,
  "errors": {},
  "output_file_id": "<string>",
  "error_file_id": "<string>",
  "in_progress_at": 123,
  "completed_at": 123,
  "failed_at": 123,
  "finalizing_at": 123,
  "expired_at": 123,
  "cancelled_at": 123,
  "cancelling_at": 123,
  "request_counts": {},
  "metadata": {}
}