Connectivity check

To ensure the ws connection is still alive, we introduced the ping ws message. It should be sent by the API client at least one time per 1 minute. Each ping message is acknowledged by the server by sending a response message. If the server doesn't get ping updates from the client for 10 minutes, it forcibly closes the connection and stops sending anything to it.

Request:

{"op" : "ping"}

Response:

{"op":"ping","connectionId":"b1b6bc98-fe6e-4744-b980-af1654fe0fd4","topics":[{"success":true,"name":"ping","message":"pong"}]}