小程序订阅一次性消息，发送报错47001，报错如下：

{

    “errcode”: 47001,

    “errmsg”: “data format error hint: [MaaOOA0541st20]”

}

请求参数：

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

{

“touser”: “opZfX5UYEwPieQ5MpDy0sNItoN10”,

“template_id”: “rFVBFdqRFUXyisPWISuTEjxjGkzKAUq7_XjVIO7mDFY”,

“page”: “pages/auth/index”,

“data”: " { \“key1\”: { \“value\”: \“测试\”}, \“key2\”: { \“value\”: \“活动\”}, \“key3\”: { \“value\”: \“已支付\”},\“key4\”: { \“value\”: \“200\”}}"

}