Mandrill API错误报告错误的格式

Question

如文档中所述，我必须为google_analytics_domains和google_analytics_campaign字段发送数组。

http://mandrillapp.com/api/docs/messages.html#method=send

但是mandrill会生成一个错误的utm_campaign链接（Google分析不喜欢[0]部分）：

utm_campaign[0]=test_campaign

我试图发送字符串而不是数组但是mandrallapi把我踢出去（请输入一个数组）...我错过了什么吗？谢谢你的帮助！

以下是mandrillapp的请求示例：

{
   "key":"apikey",
   "message":{
      "html":"example html",
      "text":"example text",
      "subject":"example subject",
      "from_email":"from_email@example.com",
      "from_name":"example from_name",
      "to":[
         {
            "email":"email@example.com",
            "name":"example name"
         }
      ],
      "headers":{
         "...":"..."
      },
      "track_opens":true,
      "track_clicks":true,
      "auto_text":true,
      "url_strip_qs":true,
      "bcc_address":"bcc_address@example.com",
      "merge":true,
      "global_merge_vars":[
         {
            "name":"example name",
            "content":"example content"
         }
      ],
      "merge_vars":[
         {
            "rcpt":"rcpt@example.com",
            "vars":[
               {
                  "name":"example name",
                  "content":"example content"
               }
            ]
         }
      ],
      "tags":[
         "example tags[]"
      ],
      "google_analytics_domains":[
         "..."
      ],
      "google_analytics_campaign":[
         "..."
      ],
      "metadata":[
         "..."
      ],
      "attachments":[
         {
            "type":"example type",
            "name":"example name",
            "content":"example content"
         }
      ]
   }
}