This command subscribes to changes that happens to a specific node or any of its children.

The server will publish changes to the client until either the connection is terminated, the logout command is sent or an unsubscribe on the node or on of its recursive parents are being sent.

subscribe <node id>

The subscription will be made if the node id exists and the current user is authenticated to subscribe to the specified node id.

If not, then an error is returned.