审批抄送状态变更

创建抄送或者被抄送人已读抄送后，会向开发者推送消息。

创建抄送，推送 "operate" 为 "CREATE" 的事件。

被抄送人已读抄送，推送 "operate" 为 "READ" 的事件。

审批抄送消息:

{    
     "ts": "1502199207.7171419",
     "uuid": "bc447199585340d1f3728d26b1c0297a",
     "token": "41a9425ea7df4536a7623e38fa321bae",
     "type": "event_callback",
     "event": { 
         "app_id": "cli_xxx", 
         "tenant_key":"xxx", 
         "type": "approval_cc", 
         "approval_code": "7C468A54-8745-2245-9675-08B7C63E7A85",
         "instance_code": "81D31358-93AF-92D6-7425-01A5D67C4E71", 
         "id": "12345",
         "user_id": "b613t51g",
         "create_time": 1502199207000, 
         "operate": "CREATE",
         "from": "b613t51g"
    }
}

消息说明:

字段	类型	描述
`type`	`string`	approval_cc 固定字段
`approval_code`	`string`	审批定义 Code
`instance_code`	`string`	审批实例 Code
`id`	`string`	抄送 ID
`user_id`	`string`	被抄送人
`create_time`	`long`	抄送时间
`operate`	`string`	操作类型 CREATE: 抄送 READ: 已读
`from`	`string`	抄送人, 可能为空