Adding channel to notification service call, json help needed

Trying to make a service call for a notification to the Companion App.
Works as long as I do an ordinary call without specifying the channel but I can’t get it to work when I add the channel.
This works:

{
    "message": "The garage door has been open for 10 minutes.",
    "title": "Your Garage Door"
}

But this does not:

{
    "message": "The garage door has been open for 10 minutes.",
    "title": "Your Garage Door",
    "data":
            channel: "Motion"
}

I don’t really know json, just cutting and pasting.
The code is based on what I found here: https://companion.home-assistant.io/docs/notifications/notifications-basic/
Here’s my Service Call:

Anyone know how I can fix this?
Thanks!

A hint…
In this code block only one work does not have " around it :wink:
In JSON it’s required with ".

Thanks, but I tried that as well, got error then also.
Should have entered it like that here, I know.

Sorry… I missed the {}.

This should work.

{
    "message": "The garage door has been open for 10 minutes.",
    "title": "Your Garage Door",
    "data":{
            "channel": "Motion"
    }
}

@Hellis81
Perfect, works!
Thanks alot!