stdClass Object ( [type] => http://developer.mailchimp.com/documentation/mailchimp/guides/error-glossary/ [title] => Invalid Resource [status] => 400 [detail] => The resource submitted could not be validated. For field-specific details, see the 'errors' array. [instance] => d871569c-4faf-4a40-8a9d-1c16034b3b22 [errors] => Array ( [0] => stdClass Object ( [field] => email_address [message] => This value should not be blank. ) ) )