Alexa_Announce.yaml

service: notify.alexa_media
data:
  message: test
  data:
    method: all
    type: announce
  title: my announce
  target: 
     - media_player.downstairs_echo
     - media_player.kitchen_echo
     
## For the target you can specify a group or set echose you want to hit with announce
## See the documentation on the wiki for more info.