'{"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":"230ce52b-7427-7de5-7a34-aea0cd72603b","errors":[{"field":"email_address","message":"This value should not be blank."}]}'