{
  "manageEntity": {
    "action": "Create",
    "entityId": "1619393909",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":1619393909,\"description\":\"GarageBand version\",\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"Rock\",\"isrc\":null,\"is_unlisted\":false,\"iswc\":null,\"license\":null,\"mood\":\"Aggressive\",\"is_stream_gated\":false,\"stream_conditions\":null,\"allowed_api_keys\":null,\"is_download_gated\":false,\"download_conditions\":null,\"title\":\"Can’t help falling in love \",\"duration\":178,\"audio_upload_id\":\"779e97a9d11ba48047e64c513f6bc291\",\"track_cid\":\"baeaaaiqsebn42quhdytoih3kjs72tlytrcyii7nc7whss2v6edctz2kuldpam\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsebeh5jpuvdrx53xaolw72jpoiap7jlhwwnj6g4tvbk54uwbsahkpm\",\"orig_filename\":\"Can’t help falling in love .m4a\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":105,\"is_custom_bpm\":false,\"musical_key\":\"D major\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":850416615,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsebplasgvioud7modm6nw3cci7vlfv6spywnufantvnrkrsqicnkb4\"}}",
    "nonce": "0x37b4bd37640ae2dc1eb4d909f1fb46be4f771ac65643abaa8a8b6da04217715a",
    "signature": "0x0ecf394ca444e31b70053751d27222dc6d4163be3c09ed18e8a5bfa480ccab537a91f05546a59523c707ed169b52598957282421f2aa3fc29d605b4fa89ede3b1b",
    "signer": "0xB57F94Ef9a26d73E8b35D3f37FccD18BcC7eeE00",
    "userId": "850416615"
  }
}