User Data Subscriptions allow client API users to perform actions, such as logging, when the client receives new User Data from the High Fidelity Audio API Server.
The callback function to call when the client receives new User Data associated with the
component from the server.
The first and only argument to the callback function will be of type
The User Data components to which we want to subscribe, such as Position, OrientationEuler, or VolumeDecibels.
providedUserID associated with the Subscription. See HiFiAudioAPIData. Optional. If unset, the Subscription callback
will be called for all users' data when it changes.