POST /v1.0/583923/servers/20265545/action?format=json HTTP/1.1
Host: servers.api.rackspacecloud.com
Connection: close
Accept-encoding: gzip, deflate
User-Agent: Zend_Http_Client
X-Auth-Token: 1234567890
Content-Type: application/json
Content-Length: 26

{"reboot":{"type":"HARD"}}