'{"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":"cdc8b09c-0f2e-65c9-73cf-c09f04e9ef1b","errors":[{"field":"email_address","message":"This value should not be blank."}]}'