抓包工具charles抓取的请求curl，是这样：
curl -H ‘:method: POST’ -H ‘:path: /client.action?functionId=signInCouponCenter&clientVersion=8.3.4&build=70302&client=android&d_brand=HUAWEI&d_model=JKM-AL00bxxxxx’ -H ‘:authority: api.m.jd.com’ -H ‘:scheme: https’ -H ‘cookie:xxxxx’ -H ‘charset: UTF-8’ -H ‘accept-encoding: gzip,deflate’ -H ‘cache-control: no-cache’ -H ‘content-type: application/x-www-form-urlencoded; charset=UTF-8’ -H ‘content-length: 95’ -H ‘user-agent: okhttp/3.12.1’ –data-binary “body=%22%7D&” ‘https://api.m.jd.com/client.action?functionId=signInCouponCenter&clientVersion=8.3.4&build=70302&client=