So I have done what you want to do. I had created a dummy device and calls it via script together with my Watchout Commander and then send Text to a misterious non existing UDP Channel on 127.0.0.1:50665.
So now I can write into the field what I want and when I am tracking the send text command in the GUI, it will shows something like “Watchout Task Nr. 3 is running”, because this is the text, which I send into space to grab me my text for the GUI ;))