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

{
  "snapshot": {
    "description": null,
    "metadata": null,
    "ref": {
      "source-name": "lvol0"
    },
    "name": null,
    "volume_id": "7c064b34-1e4b-40bd-93ca-4ac5a973661b"
  }
}