{
  "manageEntity": {
    "action": "Create",
    "entityId": "1706554386",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":1706554386,\"description\":\"ZONE, Atsumi Rei (厚見玲衣)\",\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"Pop (Ballad)\",\"isrc\":\"\",\"is_unlisted\":false,\"iswc\":\"\",\"license\":null,\"is_stream_gated\":false,\"stream_conditions\":null,\"allowed_api_keys\":null,\"is_download_gated\":false,\"download_conditions\":null,\"tags\":\"\",\"title\":\"A14-08 secret base ～君がくれたもの～ Piano Ver. (2002)\",\"duration\":148,\"audio_upload_id\":\"d68544379e5fe079c6ddb42cae84af1e\",\"track_cid\":\"baeaaaiqsebd5aiyb6sgbytxlium2fxukkxjhyxb4n3vh67xo3kdilh3cvy2ky\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqseaomgkpvheleyzsza5clc5hro53e4yosizsmkvfcywldvooflr3bs\",\"orig_filename\":\"A14-08 secret base ～君がくれたもの～ Piano Ver. (2002).mp3\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":130,\"is_custom_bpm\":false,\"musical_key\":\"E flat minor\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":281584658,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqseba5vfnm7h5vdc3rrso2vk326jymlg2u5vrn5iu25hp6ssfytcjp6\"}}",
    "nonce": "0xd1d87e2692f797309d6a58dfc78ddc08887c3bbb40a8398b06a10be05bde3f73",
    "signature": "0x75da3825b3787ba5a6512aa1b9f9be0f5be822cb1f553891d814ae039e8a3c7a1d75ad43109df92bc22803bca56368cd20ac1625662e6d4180fd0b84050bac771c",
    "signer": "0x75D7D3Ba4255a9f34ea7B51ba30354f164c5d883",
    "userId": "281584658"
  }
}