You might need keys below in some situation
          - caCertificateId
          - previousOwnedBy

def to_description_dict(self):
        """
        You might need keys below in some situation
          - caCertificateId
          - previousOwnedBy
        """
        return {
            'certificateArn': self.arn,
            'certificateId': self.certificate_id,
            'status': self.status,
            'certificatePem': self.certificate_pem,
            'ownedBy': self.owner,
            'creationDate': self.creation_date,
            'lastModifiedDate': self.last_modified_date,
            'transferData': self.transfer_data
        }