Alexa Mediaplayer action and Appdaemon

Hello,
I am using the integration “Alexa Mediaplayer” and in HA Automations it is used like this in Yaml:

> action: notify.alexa_media
> metadata: {}
> data:
>   data:
>     type: announce
>   target:
>     - media_player.wohnzimmer
>     - media_player.buro
>     - media_player.cassian
>   message: "Spülmaschine ist gelaufen "

I can imagine something like this in python

self.call_service(service = "notify.alexa_media", message="Spülmaschine ist gelaufen")

But how to specify the array of targets? A named parameter with array? targets=[a, b, c] ???
How to set the type that is oddly nested under a 2nd data:?
How to deal with the nested data in general?

In HA I can easily copy/paste or use the UI without a deeper understanding but in python I should understand it.
Unfortunately the documentation on call_service() is close to “it exists, guess the rest” while my understanding on HA services is also not sooo advanced.

Any ideas where I can find more information?

Regards Marc

I found out python likes / and behaves more like a path to a service.

self.call_service("notify/alexa_media", message="das ist ein test für service", target="Cassian")

That works ans Alexa talks… that is enough to playaround how to feed in additional options,