{
  "nftables": [
    {
      "metainfo": {
        "version": "VERSION",
        "release_name": "RELEASE_NAME",
        "json_schema_version": 1
      }
    },
    {
      "table": {
        "family": "ip",
        "name": "t",
        "handle": 0
      }
    },
    {
      "chain": {
        "family": "ip",
        "table": "t",
        "name": "c1",
        "handle": 0
      }
    },
    {
      "chain": {
        "family": "ip",
        "table": "t",
        "name": "c2",
        "handle": 0
      }
    },
    {
      "set": {
        "family": "ip",
        "name": "s1",
        "table": "t",
        "type": [
          "ipv4_addr",
          "ipv4_addr",
          "inet_service"
        ],
        "handle": 0,
        "size": 65535,
        "flags": [
          "timeout",
          "dynamic"
        ],
        "timeout": 10800
      }
    },
    {
      "rule": {
        "family": "ip",
        "table": "t",
        "chain": "c1",
        "handle": 0,
        "expr": [
          {
            "set": {
              "op": "update",
              "elem": {
                "concat": [
                  {
                    "payload": {
                      "protocol": "ip",
                      "field": "saddr"
                    }
                  },
                  "10.180.0.4",
                  80
                ]
              },
              "set": "@s1"
            }
          }
        ]
      }
    },
    {
      "rule": {
        "family": "ip",
        "table": "t",
        "chain": "c2",
        "handle": 0,
        "expr": [
          {
            "match": {
              "op": "==",
              "left": {
                "concat": [
                  {
                    "payload": {
                      "protocol": "ip",
                      "field": "saddr"
                    }
                  },
                  "1.2.3.4",
                  80
                ]
              },
              "right": "@s1"
            }
          },
          {
            "goto": {
              "target": "c1"
            }
          }
        ]
      }
    }
  ]
}