优化一下这样的json结构的生成结果

[gpf0205]

json结构如下：
{
"createTime": "",
"desGroupId": 0,
"id": 0,
"originPointId": 0,
"paths": [
[1.11111, 1.22222],
[2.3131, 99921]
],
"travelType": "22"
}