Suggested event messages from buddycloud federated server to another

gistfile1.xml

<message type="headline" from="channels.server2.com" to="channels.server1.com">
    <event>
        <subscription node="/user/[email protected]/posts"
                      jid="[email protected]"
                      subscription="subscribed" />
        <actor jid="[email protected]" xmlns="http://buddycloud.org/v1" />
        <actor jid="[email protected]" xmlns="http://buddycloud.org/v1" />
    </event>
</message>