{
  "nftables": [
    {
      "metainfo": {
        "version": "VERSION",
        "release_name": "RELEASE_NAME",
        "json_schema_version": 1
      }
    },
    {
      "table": {
        "family": "ip",
        "name": "x",
        "handle": 0
      }
    },
    {
      "set": {
        "family": "ip",
        "name": "y",
        "table": "x",
        "type": "ipv4_addr",
        "handle": 0,
        "flags": [
          "interval"
        ],
        "elem": [
          {
            "prefix": {
              "addr": "192.168.4.0",
              "len": 24
            }
          }
        ]
      }
    }
  ]
}