nova/nova/tests/functional/api_sample_tests/api_samples/os-volumes/v2.85/attach-volume-to-server-resp.json.tpl

{
    "volumeAttachment": {
        "device": "%(device)s",
        "id": "%(volume_id)s",
        "serverId": "%(uuid)s",
        "tag": "%(tag)s",
        "volumeId": "%(volume_id)s",
        "delete_on_termination": true
    }
}