{ 
    "command"  : "ADD",         /* Or "REMOVE" */
    "domainId" : "DOMAIN_NAME", /* Domain Name */
    "topic":     "ODM_Channel"  /* Channel Name */
}

SUBSCRIBE to specific event channels using the channel name, called a topic in websocket parlance, and the Domain ID (name) by writing the above JSON structure to the socket.

UNSUBSCRIBE from a specific event channel by changing the command to REMOVE and specifying the topic.