https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token=ACCESS_TOKEN

Java后端请求以上地址向用户发送订阅消息，返回47001，错误信息如下

{"errcode":47001,"errmsg":"data format error hint: [FGFcWV0sf-_rtrsA] rid: 645dd8cd-6e0ba490-41bbaa4a"}

请求数据如下

{"touser":"o40iS5elyHXeQ-hzKNAPQl-GFvmY","data":{"car_number9":{"value":"粤A435Z8"},"thing3":{"value":"南通市汽车站"},"date4":{"value":"2022-09-12 12:12:12"},"thing2":{"value":"上海汽车票站"},"thing1":{"value":"汽车票出行提醒"}},"template_id":"VMz8OfSog7jk8EsjD5Jkz9iWKv6J5BOSh74GL_vtSPQ","miniprogram_state":"formal","lang":"zh_CN"}

是什么原因造成的，求指导？