cinder/api-ref/source/v3/samples/quotas-user-show-detailed-response.json

{
    "quota_set": {
        "gigabytes": {
            "in_use": 100,
            "limit": -1,
            "reserved": 0
        },
        "snapshots": {
            "in_use": 12,
            "limit": -1,
            "reserved": 0
        },
        "volumes": {
            "in_use": 1,
            "limit": -1,
            "reserved": 0
        }
    }
}