Wildcard on mqtt topic trigger

Would you please confirm that I have the correct syntax on this automation?
I expect the mqtt message to have a topic like ‘homeassistant/mydevicename/topic’

- id: "DeepSleepActivityMessage"
  alias: Deep Sleep Activity Message
  trigger:
    platform: mqtt
    topic: +/#/topic
  action:
    - service: system_log.write
      data_template:
        message:   "{{ trigger.entity_id }} {{ trigger.payload }}"
        level: warning