消息头
	发信方，收信方，消息基础类型，消息体路由信息
消息体
	消息处理器处理消息

```json 消息设计，草稿
{
	"header": {
		"from": {
			"type": "community", 
			"code": "community_id"
		},
		"receiver": {
			"type": "grid",
			"code": "grid_id"
		},
		"timestamp": "yyyymmddhhMMssssss",
		"msg_type": "data_report", // 
		"msg_title": "community_population", // body的解析格式名
		"msg_version": "1" // body的解析格式版本
	},
	"body": {} // 消息内容由各场景具休定义
}
```