tr>
                    <tr>
                        <td>subscribers_role</td>
                        <td>List(of Strings)</td>
                        <td>List of roles subscribed to the announcement</td>
                    </tr>
                    <tr>
                        <td>subscribers_user</td>
                        <td>List(of Strings)</td>
                        <td>List of users subscribed to the announcement</td>
                    </tr>
                    </tbody>
                </tab