nova/doc/api_samples/os-aggregates/aggregates-get-resp.json

{
    "aggregate": {
        "availability_zone": "london",
        "created_at": "2013-08-18T12:17:56.380226",
        "deleted": false,
        "deleted_at": null,
        "hosts": [],
        "id": 1,
        "metadata": {
            "availability_zone": "london"
        },
        "name": "name",
        "updated_at": null
    }
}