JAVA后台进行推送时出现1003，但是相关参数已经设置

你好，在使用java后台进行推送时，后台返回

    Error response from JPush server. Should review and fix it.  
HTTP Status: 400
Error Code: 1003 
Error Message: 'time_to_live' value is invalid. 
Msg ID: 0 result:null
json参数：
    {
"platform": "all",
"audience": {
"alias": [
"578fef192aaf4647a074c49819aeb81e"
]
},
"notification": {
"alert": "有新的作业，请及时完成"
},
"options": {
"sendno": 1256786560,
"override_msg_id": 1,
"time_to_live": 60,
"apns_production": false
}
}

time_to_live：已经设置，还是有这个问题，已经找了好久，请帮忙看一下json格式是否需要修改，谢谢了

java代码：

     PushPayload push = PushPayload.newBuilder().setPlatform(
                Platform.all())
                .setOptions(Options.newBuilder().setApnsProduction(false).setTimeToLive(60).setOverrideMsgId(1).build())
                .setAudience(Audience.alias(alias))
                .setNotification(Notification.alert(msg))
                .build();
result = jpush.sendPush(push);