const newMetaData = {
    ContentType: current.ContentType,
    ContentEncoding: current.ContentEncoding,
    ContentLanguage: current.ContentLanguage,
    Expires: current.Expires,
    WebsiteRedirectLocation: current.WebsiteRedirectLocation,
    CacheControl: current.CacheControl,
    ContentDisposition: current.ContentDisposition,
    ServerSideEncryption: current.ServerSideEncryption,
    StorageClass: current.StorageClass,
    SSEKMSKeyId: current.SSEKMSKeyId,
    MetadataDirective: 'REPLACE',
    Metadata: {
        'my-new-key': 'some value'
    }
}