Need to check array response with object

Hi I need to solve this problem: I need to check my responce. I wrote some tests in “Tests” tub, but non of them didn’t work :frowning:

My JSON responce looks like

“context”: [

    {

        "property": "last_name",

        "value": [

            "Last Name should contain at most 255 characters."

        ]

    }

],

So, How can I check the text in “property” and “value” ?