Perform PUT /rooms/$room_id/send/m.room.message with m.notice msgtype

        Args:
            room_id (str): The room ID to send the event in.
            text_content (str): The m.notice body to send.
            timestamp (int): Set origin_server_ts (For application services only)

def send_notice(self, room_id, text_content, timestamp=None):
        """Perform PUT /rooms/$room_id/send/m.room.message with m.notice msgtype

        Args:
            room_id (str): The room ID to send the event in.
            text_content (str): The m.notice body to send.
            timestamp (int): Set origin_server_ts (For application services only)
        """
        body = {
            "msgtype": "m.notice",
            "body": text_content
        }
        return self.send_message_event(room_id, "m.room.message", body,
                                       timestamp=timestamp)