The subscribe request is different than LibertasClusterReadReq in that an event ID can be set as "urgent." The minInterval and maxInterval are in seconds.
The effective minInterval and maxInterval may differ due to the varying requirements of multiple agents and device settings.
The maxInterval affects the report timeout. The underlying Libertas OS performs timeout detection. The Thing-App task can keep idling until a report or error occurs.
Represents a cluster subscription request of a device.