是我组成签名的字符串有问题吗，没有 body 可以验证通过。


调用接口：   /v3/pay/transactions/h5
请求参数：
{
  "appid": "wxappid",
  "mchid": "wxmachid",
  "description": "aa",
  "out_trade_no": "202008200202",
  "notify_url": "http://baidu.com",
  "amount": {
    "total": 1000,
    "currency": "CNY"
  },
  "scene_info": {
    "payer_client_ip": "127.0.0.1",
    "h5_info": {
      "type": "Wap",
      "app_name": "shop"
    }
  }
}

签名的字符串：
GET
/v3/pay/transactions/h5
1598005672
5f494a06a252f974a9befb04a1175db1
{"appid":"wxappid","mchid":"wxmachid","description":"aa","out_trade_no":"202008200202","notify_url":"http://baidu.com","amount":{"total":1000,"currency":"CNY"},"scene_info":{"payer_client_ip":"127.0.0.1","h5_info":{"type":"Wap","app_name":"shop"}}}