{
    "rebuild" : {
        "accessIPv4" : "1.2.3.4",
        "accessIPv6" : "80fe::",
        "OS-DCF:diskConfig": "AUTO",
        "imageRef" : "70a599e0-31e7-49b7-b260-868f441e862b",
        "name" : "foobar",
        "adminPass" : "seekr3t",
        "hostname": "updated-hostname.example.com",
        "metadata" : {
            "meta_var" : "meta_val"
        },
        "user_data": "ZWNobyAiaGVsbG8gd29ybGQi"
    }
}