{
  "nftables": [
    {
      "metainfo": {
        "version": "VERSION",
        "release_name": "RELEASE_NAME",
        "json_schema_version": 1
      }
    },
    {
      "table": {
        "family": "inet",
        "name": "t",
        "handle": 0
      }
    },
    {
      "chain": {
        "family": "inet",
        "table": "t",
        "name": "c",
        "handle": 0
      }
    },
    {
      "map": {
        "family": "inet",
        "name": "m1",
        "table": "t",
        "type": "ifname",
        "handle": 0,
        "map": "ipv4_addr",
        "elem": [
          [
            "eth0",
            "1.1.1.1"
          ]
        ]
      }
    },
    {
      "rule": {
        "family": "inet",
        "table": "t",
        "chain": "c",
        "handle": 0,
        "expr": [
          {
            "mangle": {
              "key": {
                "payload": {
                  "protocol": "ip",
                  "field": "daddr"
                }
              },
              "value": {
                "map": {
                  "key": {
                    "meta": {
                      "key": "iifname"
                    }
                  },
                  "data": "@m1"
                }
              }
            }
          }
        ]
      }
    },
    {
      "rule": {
        "family": "inet",
        "table": "t",
        "chain": "c",
        "handle": 0,
        "expr": [
          {
            "mangle": {
              "key": {
                "payload": {
                  "protocol": "ip",
                  "field": "daddr"
                }
              },
              "value": {
                "map": {
                  "key": {
                    "meta": {
                      "key": "oifname"
                    }
                  },
                  "data": "@m1"
                }
              }
            }
          }
        ]
      }
    }
  ]
}