模板消息JSON字符串：{

                                    "touser":"oqN4b07hInKCLuF85Lk_FPto7fcE",

                                    "template_id":"2etkGqe25Y0K_ym2rgMiM9yGHx1XAF-9geMEQ-EZtr8",

                                    "data": {"first": {"value":"【消费】会员卡号13862842618，单号XS-2023-12-11-186305增加0积分，储值消费-380元！","color":"#173177"},"keyword1": {"value":"13862842618","color":"#173177"},"keyword2": {"value":"380元","color":"#173177"},"keyword3": {"value":"28821元","color":"#173177"},"keyword4": {"value":"829540","color":"#173177"},"keyword5": {"value":"2023-12-11 10:02:19","color":"#173177"},"remark":{"value":"谢谢惠顾！","color":"#173177"}}

                                }

接口返回成功：{"errcode":0,"errmsg":"ok","msgid":3232432535151001600}

调用接口的时候，用的UTF-8编码，这是什么原因？