How to use jsonGet using a tag path in a expression tag

i have a json string in a tag . this tag path should be used in another expression tag to extract individual values.
eg: tag1={‘firstThing’:1, ‘secondThing’:2}
tag2 = jsonGet(tag1 path,firstThing) #this is a expression tag under diffrent folder
value should be 1
i hope my question is clear .Any solution??

Tag3 value:

{“first”:13,“second”:14}

New expression tag :

jsonGet(jsonFormat({[.]Tag3}),“first”)

Your tag1 value is string, not json object.

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This also works
image

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