POST /v1.0/1234/mgmt/hosts/hostname/instances/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/json
Content-Type: application/json

{
    "update": {}
}