how can I get the file name from this type of encode string?
4EK4hB_X0ZfUOEi7ltY4j5fM94TlkLirbywKzVnK_F-8VS5Y8Q7P9Xr9a8cgA9yBjmRnz92K-V4keCWMLA4cywjF1oPhKecRuOkceNU0R1WqOoZiludfbXOcvsHINyCSqojvfl8abgbDooyQXaMsuMStpti0nKJ5HGmgy4rzpsn1AcJyg9dfQp1nYToVZwEGt0Ttc62zTSSp-l9kCGVT1jiMqZahSpr_rkknPcQitvVWSK8Qv-Akju36BmukOx-91ZheKRu0V3b6EbAe9-d11GRWe4-YqPvX3q9WGvhdhWLIBKiZ8CNkFWLml8WPNS9-SaW5vJDrDm8CWF2kvXOqD25bVLieZW5sGYVexv5urx2AWqhx9C4Bb5FP-BoOaIMNmaTUUifWbqiyMUSeRc7vDRas6ITjwRHbGtcVq4hpSQqJrknja_XMCLtkZBhsFzhT9cPp8RTNEV3QuVhLw5fZTUtyulsS5atyi-4_csUr4KtFGJkqw2SVjDgQm-GYyNPSzG-N5CXI6BL7R2rvXcJMYXNHOfGOhMJrfPERUTTs-HZsSrF4whVQsZtf8K2W_-TEtaxcK5pD2vka_nubKAJSqSYHjDvHLwrkt1NB37hTAuu-gnDresOnAna_0NkCfLSVBIdscUnRVp3IzfgkYKh_cEvNO5DcwCpFoZ2LIxPjbP636itl-DLeYBldSUo2BjDzBisfwko59wh3kPM