Message structure
| id | For this message type id attribute has no value. |
| type | keep_alive |
| source | Internal attribute, please dont use this attribute |
| ut | Information about the date and time of when the message was created. Format UNIX_TIMESTAMP |
| ..data | |
| ...keep_alive | |
| event_id | Identifier of the event. More information about event identificators in the API method: events.index |
| action | Describes type of operation. For this message type, action attribute always has update value |
| clock_time | Number of seconds that have passed in the current period |
| clock_status | Clock status. Possible value:
|