微信营销图片上传接口：/v3/marketing/favor/media/image-upload，调用返回500错误，无法确定是确定错误还是其它错误。
Header的签名信息
authorization message=[POST
/v3/marketing/favor/media/image-upload
1578652570
6pRV1NvFZQYKYiEQK78V4S3pZ7kzbzne
"filename""by-logo.png""sha256""4d94a92557230dcae7c650b3a02128c6d3e341e98c42fb4e56bf95b750173fc4"}
]
图片上传api,https://api.mch.weixin.qq.com/v3/marketing/favor/media/image-upload报500异常，meta的json串{"filename":"otherPhoto3.png","sha256":"ee00a511cb2e0a5104018dbf37d42970cbfb3e0286a75046a49a81e4c044f27a"}，这种是我们参数没传对，还是接口报错了
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