nova/doc/v3/api_samples/os-access-ips/server-action-rebuild.json

{
    "rebuild" : {
        "accessIPv4": "4.3.2.1",
        "accessIPv6": "80fe::",
        "imageRef" : "http://glance.openstack.example.com/images/70a599e0-31e7-49b7-b260-868f441e862b",
        "name" : "new-server-test",
        "metadata" : {
            "meta_var" : "meta_val"
        }
    }
}