微信小程序订阅推送消息报字段过长，检查文档并未超长

请求参数

{

  "data": "{\"thing11\":{\"value\":\"温馨提示\"},\"thing5\":{\"value\":\"活动名称\"},\"date2\":{\"value\":\"2023-07-10 00:00:00\"}}",

  "miniprogram_state": "developer",

  "page": "/pages/listdetail/listdetail",

  "template_id": "G9XGSU8hmLscOpJ-b7QfvlFNy-MreO27gCD3XchhYRE",

  "touser": "odX245FoCdnzXhMYmFpMIhuTN5UQ"

}

返回错误：

{"errcode":47003,"errmsg":"argument invalid! data.thing5.value is empty rid: 64abe029-13298e28-54e75bdb"}