{
  "nftables": [
    {
      "metainfo": {
        "version": "VERSION",
        "release_name": "RELEASE_NAME",
        "json_schema_version": 1
      }
    },
    {
      "table": {
        "family": "inet",
        "name": "filter",
        "handle": 0
      }
    },
    {
      "chain": {
        "family": "inet",
        "table": "filter",
        "name": "input",
        "handle": 0,
        "type": "filter",
        "hook": "input",
        "prio": 0,
        "policy": "accept"
      }
    },
    {
      "ct helper": {
        "family": "inet",
        "name": "sip-5060u",
        "table": "filter",
        "handle": 0,
        "type": "sip",
        "protocol": "udp",
        "l3proto": "ip"
      }
    },
    {
      "ct helper": {
        "family": "inet",
        "name": "sip-5060t",
        "table": "filter",
        "handle": 0,
        "type": "sip",
        "protocol": "tcp",
        "l3proto": "ip"
      }
    },
    {
      "rule": {
        "family": "inet",
        "table": "filter",
        "chain": "input",
        "handle": 0,
        "expr": [
          {
            "ct helper": {
              "map": {
                "key": {
                  "concat": [
                    {
                      "payload": {
                        "protocol": "ip",
                        "field": "protocol"
                      }
                    },
                    {
                      "payload": {
                        "protocol": "th",
                        "field": "dport"
                      }
                    }
                  ]
                },
                "data": {
                  "set": [
                    [
                      {
                        "concat": [
                          "udp",
                          {
                            "range": [
                              10000,
                              20000
                            ]
                          }
                        ]
                      },
                      "sip-5060u"
                    ],
                    [
                      {
                        "concat": [
                          "tcp",
                          {
                            "range": [
                              10000,
                              20000
                            ]
                          }
                        ]
                      },
                      "sip-5060t"
                    ]
                  ]
                }
              }
            }
          }
        ]
      }
    }
  ]
}