How to make array on Server Action with dynamic arguments? (e.g.: $_GET)

Hi,

I’m trying to make an array using e.g. Set Value

The problem is, I need to get a variable from $_PARAM or $_GET

Set Value = {{ [{message: $_PARAM.message}] }}

That doesn’t work, it’s a syntax error. But this works with a static string:

Set Value = {{ [{message: "hello"}] }}

Also tried another technique, with no success:

Screenshot750×392 27.1 KB

Edit: Forgot I can use RunJS by JonL