以下是请求头的信息，使用的是.net core 2.1开发 {Method: POST, RequestUri: 'https://api.mch.weixin.qq.com/v3/businesscircle/points/notify', Version: 2.0, Content: System.Net.Http.StringContent, Headers: {   User-Agent: Mozilla/4.0   User-Agent: (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)   Accept: application/json   Authorization: WECHATPAY2-SHA256-RSA2048 mchid="1463333902",nonce_str="uxjljsau.tuk",timestamp="1618379612",serial_no="7F52EE91F37836893314E39973F24D73B54D53BA",signature="O09abXN/0Q+0D6wqNACOWKWld2hk0t/8llrKU1VfK6SZb2wqUZild1zzYqgbjNMENyhrmZYAftQizjZRbfbQXO317gZSfYc1LSu8O+p84RJNup3LxuZtO8aI+hUhGsYBnWoVtVFMbJdL00ShbrTwmwmBtwxGWBbY2GFe6NlYj9J3WIF6YdH6Rm16IleOnc7iVm9HK4VusltBVVQF3NzoSx9hay/5Mkt1DPbwfYxUyCMMCjCbPaX/rko0J7IAPZiQckHKKm3XRCXJJ8rFjFoT6sE1CdHVmE8tD7B+jxmjMbbPUkNKWxX/KvPP0j5rp/8HG1Sa3u1Tvygj72fPfEgkjg=="   Content-Type: application/json; charset=utf-8   Content-Length: 230 }}

调用方法使用的是微信提供的C#方法调用，请求一直返回bad request