需要手动在路由中心设置自定义属性。示例代码如下：

{
  "routes": {
    "customRoute": "FROM /messages/* INTO BrokeredEndpoint(\"/modules/module1/inputs/input1\")",
    "customPropertiesRoute": "FROM /messages/modules/module1/outputs/output1 INTO BrokeredEndpoint(\"/modules/module2/inputs/input2\")",
    "customPropertiesRouteWithProperties": "FROM /messages/modules/module1/outputs/output2 WHERE $body.custom.property = 'value' INTO BrokeredEndpoint(\"/modules/module3/inputs/input3\")"
  },
  "storeAndForwardConfiguration": {
    "timeToLiveSecs": 7200
  }
}

在上面的示例中，我们设置了三个路由：customRoute，customPropertiesRoute和customPropertiesRouteWithProperties。其中，customRoute没有任何自定义属性；customPropertiesRoute通过“$ body”语法将自定义属性添加到传递的消息中；customPropertiesRouteWithProperties则仅将指定属性值满足特定条件的消息传递到下一个模块。