POST /v1.0/1234/mgmt/instances/475baf88-53b8-4ebb-932a-a2518227a6c6/action HTTP/1.1
User-Agent: python-example-client
Host: ord.databases.api.rackspacecloud.com
X-Auth-Token: 73d60021-96e1-4d06-843d-72d20fa5377b
Accept: application/xml
Content-Type: application/xml

<?xml version="1.0" ?>
<reboot xmlns="http://docs.openstack.org/database/api/v1.0"/>