deb-cinder/api-ref/source/v1/samples/snapshot-create-request.json

{
    "snapshot": {
        "display_name": "snap-001",
        "display_description": "Daily backup",
        "volume_id": "521752a6-acf6-4b2d-bc7a-119f9148cd8c",
        "force": true
    }
}