How to validate response in Postman?

I am trying to validate response body including errors in postman. How can I validate the response and text below?

{"responseHeader": {"publisherId": "12345","responseId": "abbcb15d79d54f5dbc473e502e2242c4abbcb15d79d54f5dbc473e502e224264","errors": [            {"errorCode": "1004","errorMessage": "XXXX Not Found"            }        ]    }}

These are my tests which are failing:

tests['response json contains responseHeader'] = _.has(responseJSON, 'responseHeader');tests['response json contains errors'] = _.has(responseJSON, 'responseHeader.publisherId');tests["Response has publisher id"] = responseJSON.publisherId === 10003;