Hmm now im trying to send JSON in the same way but
Code:
var %tracks = $+({ "tracks": [{ "uri": " $+ %delsong $+ " }] })

this returns
Code:
"status": 400,
"message": "JSON body does not adhere to the defined endpoint parameters: \"tracks\": [{ \"uri\": \"spotify:track:5eWgDlp3k6Tb5RD8690s6I\" }]"

mind that it doesnt show the opening bracket in the error description, which makes me think it dropped that for some reason and thinks its part of the code? So i tried using $chr(123) but this:

Code:
var %tracks = $+( $chr(123) "tracks": [{ "uri": " $+ %delsong $+ " }] })

returns 'malformed JSON Body'

I wonder whats the best way to go about this