{
  "nftables": [
    {
      "metainfo": {
        "version": "VERSION",
        "release_name": "RELEASE_NAME",
        "json_schema_version": 1
      }
    },
    {
      "table": {
        "family": "ip",
        "name": "t",
        "handle": 0
      }
    },
    {
      "set": {
        "family": "ip",
        "name": "s",
        "table": "t",
        "type": [
          "ipv4_addr",
          "ifname"
        ],
        "handle": 0,
        "flags": [
          "interval"
        ],
        "elem": [
          {
            "concat": [
              "1.2.3.4",
              "foo"
            ]
          }
        ]
      }
    }
  ]
}