Display Block with Variables

Hi, I’m trying to add variables to my display datasource but I can’t get it to work.
What I’ve done is: Opened the authoring tool, selected a template and downloaded the code.
Then I imported it into voiceflow and tried to change a simple text into a variable (as shown in the video tutorial) but I keep getting an error.
Schermata 2020-02-20 alle 15.56.49
What should I do to get it to work?

enclose by double quotes. like this:


This approach is not working for me. I tried it both with and without double quotes and neither approach is working for me. Here is what that section of my datasource looks like now:

"title": "{tipheader}",

Display block has been changed since the last post, but I just tried very small test and it still works.

how does not work?