     <tr>
                        <td>add_subscribers_role</td>
                        <td>List(of Strings)</td>
                        <td>List of roles to subscribe to the announcement</td>
                        <td>False</td>
                    </tr>
                    <tr>
                        <td>add_subscribers_user</td>
                        <td>List(of Strings)</td>
                        <td>List of users to subscribe to the announcement</td>
                        <td>False</td>
     