Problem with intents :MacroDroid
If you want to turn on the Out Loud using automation app, do this:

Target: Activity
Package: com.hillman.out_loud
Class: com.hillman.out_loud.activity.OnActivity

Leave the rest entries untouched.
If you want to turn off the Out Loud, do this:

Target: Activity
Package: com.hillman.out_loud
Class: com.hillman.out_loud.activity.OffActivity

If you want to toggle the state, do this:

Target: Activity
Package: com.hillman.out_loud
Class: com.hillman.out_loud.activity.ToggleOnOffActivity

Check your notification panel/bar to see the changes. If toggled to On state, Loud Out would create a notification (low priority), else the notification would be missing.