| Name | Type | Description | Notes |
|---|---|---|---|
| id | int | Order book ID, which is updated whenever the order book is changed. Valid only when `with_id` is set to `true` | [optional] |
| current | int | Response data generation timestamp in milliseconds | [optional] |
| update | int | Order book changed timestamp in milliseconds | [optional] |
| asks | string[][] | Asks order depth | |
| bids | string[][] | Bids order depth |