Use trigger variables for notifications

Hi,
I’m trying to use device variable inside a notification of trigger, but it’s not working.
When I write the trigger variable inside the message body, I’m not getting the notification at all.
Appreciate any help, here’s my code:

alias: Boiler ON/OFF
description: ''
trigger:
  - platform: device
    type: changed_states
    device_id: a463270721489a8907g1ajc903bfab03
    entity_id: switch.boiler
    domain: switch
condition: []
action:
  - service: notify.me
    data:
      message: 'Boiler is {{ trigger.event.event_type }}'
mode: single

Thanks!

The same behavior with zone variables:

alias: Enter or leave home
description: ''
trigger:
  - platform: zone
    entity_id: group.device_trackers, group.awesome_people
    zone: zone.home
    event: enter
  - platform: zone
    entity_id: group.device_trackers
    zone: zone.home
    event: leave
condition: []
action:
  - service: notify.mobile_app_gm1903
    data:
      message: '{{ trigger.entity_id }} {{ trigger.event }} Home'
mode: single