Certain substitutions are available for the MQTT Topic field when events are routed.
Will be replaced with the Device's UID, stripped of the "dev:" prefix.
Will be replaced with the ProductUID associated with the device.
Will be replaced with the Device's Serial Number.
Therefore, for an event from a device with a UID of
"dev:1234" and ProductUID of "com.example.test", the MQTT
Topic "[product]/devices/[device]" would actually send the
event body to the topic "com.example.test/devices/1234".
By default, the topic is set to "device/[device]".