如何在Golang的顶级结构中检索嵌套的json值？

我试图从API调用中检索数据并将其传递给另一个服务。我收到的数据是在一个特定的JSON结构，我想把它映射到一个结构，但没有多层次的数据。我尝试了点符号来访问更深的值，但它不起作用。

基本上，我试图得到一个包含一系列“问题”（key、self、description）的结构，但没有“fields.description”结构。

JSON：

{
  "ticket": {
    "number": "2",
    "issues": [
      {
        "key": "TA-2",
        "self": "http://localhost:8080/rest/api/2/issue/10100",
        "fields": {
          "description": "This template is used to create openshift project.\n|Type|Value|Help|\n|project_name|personal_project|Enter the name of your openshift project|\n|memory|8GB|Enter the desired amount of memory|"
        }
      },
      {
        "key": "TA-1",
        "self": "http://localhost:8080/rest/api/2/issue/10000",
        "fields": {
          "description": "This template is used to create openshift project.\n|Type|Value|Help|\n|project_name|my_openshift_project|Enter the name of your openshift project|\n|memory|4GB|Enter the desired amount of memory|"
        }
      }
    ]
  }
}

结构：

type Todo struct {
  Number string `json:"number"`
  Issue  []struct {
      Key         string `json:"key"`
      Self        string `json:"self"`
      Description string `json:"field.description"` //doesn't work. don't know what to put ...
  } `json:"issues"`
}

预期/期望的结构：

{
  "number": "2",
  "issues": [{
    "key": "TA-2",
    "self": "http://localhost:8080/rest/api/2/issue/10100",
    "description": "This template ..."
  }, {
    "key": "TA-1",
    "self": "http://localhost:8080/rest/api/2/issue/10000",
    "description": "This template ..."
  }]
}

有可能吗？如果是，怎么做？使用嵌套结构不会更改初始JSON结构。

谢啦