curl -X POST "https://example.com/v1/batches/497f6eca-6276-4993-bfeb-53cbbbba6f08/cancel"{
"id": "string",
"status": "pending",
"window": "24h",
"request_count": 0,
"created_at": "string",
"updated_at": "string",
"completed_at": "string",
"total_prompt_tokens": 0,
"total_completion_tokens": 0,
"total_tokens": 0,
"total_cost_micros": 0
}{
"status_code": 400,
"detail": "Bad Request",
"extra": {}
}