I added my harmony hub and i'm trying to add volume up, volume down and mute buttons. I created virtual buttons for my dashboard to control them. When I go to rule machine, I set my trigger for the button, but when I go to Type of Action, i'm not sure what to select at the point. For example, the Harmony hub parent has a command called VolumeUp, but i'm not sure how to add that as an action in rule machine.