Assertion on response in neoload as code

i want to perform an assertion that specific text is present in the response of API, i have followed the steps mentioned in documentation but the assertion fails,

My response:

{
"assessmentName": "Tool",
"questnrVerId": 21,

}
i want to check if i have this "questnrVerId" in my response and its a number

i have added following items in userpath for assertion

assertions:

• contains: ^.*questnrVerId.*$
regexp: true

but it fails, can you please help me why my assertion is failing ?