QCloudSMHGetDownloadInfoRequest * requeset = [[QCloudSMHGetDownloadInfoRequest alloc]init];
// The organizational affiliation id of the space. This field only requires filling in when accessing a public group.
// Space ID. If the media library is in single-tenant mode, this parameter is fixed as a hyphen (-); if the media library is in multi-tenant mode, you must specify this parameter.
requeset.spaceId = @"spaceId";
// Media Library ID, required parameter
requeset.libraryId = @"libraryId";
// version id
requeset.historyId = @"historVersionId";
// file path
requeset.filePath = @"filePath";
[requeset setFinishBlock:^(QCloudSMHDownloadInfoModel * outputObject, NSError * _Nullable error) {

}];
[[QCloudSMHService defaultSMHService] getDonwloadInfo:requeset];