cinder/api-ref/source/v3/samples/snapshot-create-request.json

{
    "snapshot": {
        "name": "snap-001",
        "description": "Daily backup",
        "volume_id": "5aa119a8-d25b-45a7-8d1b-88e127885635",
        "force": true,
        "metadata": null
    }
}