Lgtv: How to start an app?

for the last two hours I tried to bind my LG-TV (2012) model to openHAB and to create a button to start the built-in Netflix app. While the binding is okay…

2016-09-08 23:31:05.752 [INFO ] [b.lgtv.internal.LgtvConnection] - lgtv connectionstatus of ip= changed from CS_NOTCONNECTED to CS_PAIRED
2016-09-08 23:31:05.754 [DEBUG] [b.lgtv.internal.LgtvConnection] - sendtohandlers remoteaddr= message=CONNECTION_STATUS=1
2016-09-08 23:31:05.756 [DEBUG] [.o.b.lgtv.internal.LgtvBinding] - Received status update 'CONNECTION_STATUS=1' from ip for deviceId WZ

…I fail completely at configuring the call for the desired app.

As far as I found out, it seems I need to know the internal ID of the app first.
I tried to understand the documentation https://github.com/openhab/openhab/wiki/Lg-TV but I’m missing an example for my special case.

So, if someone could help me out I’d be grateful - thanks!