nova/doc/api_samples/os-floating-ips/floating-ips-get-resp.json

{
    "floating_ip": {
        "fixed_ip": null,
        "id": "8baeddb4-45e2-4c36-8cb7-d79439a5f67c",
        "instance_id": null,
        "ip": "172.24.4.17",
        "pool": "public"
    }
}