'{"type":"https://mailchimp.com/developer/marketing/docs/errors/","title":"Invalid Resource","status":400,"detail":"The resource submitted could not be validated. For field-specific details, see the \'errors\' array.","instance":"3693e3c1-e924-b296-9476-c7b7387209f2","errors":[{"field":"email_address","message":"This value should not be blank."}]}'