[
  {
    "gt": [[230150, 185809, 24040000]], //trace_id 链路编码，与调用方相同
    "sg": {
      "ts": [137150, 185809, 48780000], //segment_id，新产生
      "ai": 2,
      "ii": 3,
      "ss": [
        {
          "si": 0,
          "tv": 0,
          "lv": 2,
          "ps": -1,
          "st": 1501858094726,
          "et": 1501858096804,
          "ci": 3,
          "cn": "",
          "oi": 0,
          "on": "org.skywaking.apm.testcase.dubbo.services.GreetService.doBusiness()",
          "pi": 0,
          "pn": "",
          "ie": false,
          "rs": [
            {
              "pts": [230150, 185809, 24040000], //上级的segment_id 一个应用中的一个实例在链路中产生的编号
              "pii": 2, //上级的实例编号
              "psp": 1, //上级的埋点编号span_id
              "psi": 0, //上级的服务编号(org.skywaking.apm.testcase.dubbo.services.GreetService.doBusiness()注册后的ID)
              "psn": "/dubbox-case/case/dubbox-rest", //上级的服务名
              "ni": 0,  //上级调用时使用的地址注册后的ID
              "nn": "172.25.0.4:20880", //上级的地址
              "eii": 2, //入口的实例编号
              "esi": 0, //入口的服务编号
              "esn": "/dubbox-case/case/dubbox-rest", //入口的服务名词
              "rn": 0 //调用方式（CrossProcess，CrossThread）
            }
          ],
          "to": [
            {
              "k": "url",
              "v": "rest://172.25.0.4:20880/org.skywaking.apm.testcase.dubbo.services.GreetService.doBusiness()"
            },
            {
              "k": "http.method",
              "v": "GET"
            }
          ],
          "lo": []
        },
        {
          "si": 1,
          "tv": 1,
          "lv": 1,
          "ps": 0,
          "st": 1501858094726,
          "et": 1501858095804,
          "ci": 9,
          "cn": "",
          "oi": 0,
          "on": "mongodb://[username:password@]host1[:port1][,host2[:port2],...[,hostN[:portN]]][/[database][?options]]",
          "pi": 0,
          "pn": "localhost:27017",
          "ie": false,
          "to": [],
          "lo": []
        }
      ]
    }
  }
]