@Schoppi,
Your comment is unnecessary
@namraccr comment was valid. I made the same one just after him.
I gave you the link to jsonpath.com for you to go there and learn. If you figure it out by yourself you actually learn something.
If we give you the answer on a plate, you are none the wiser.
You really need to get familiar with JSONPATH if you are going to be serious with openHAB. It’s an important syntax/format.
We know you are not programmers. I am not either. But I learned jsonpath myself and most of openHAB by reading and trying and reading again.
So you need to help yourself first before asking the forum.
Did you read How to ask a good question / Help Us Help You?