{
  "manageEntity": {
    "action": "Create",
    "entityId": "1876653985",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":1876653985,\"description\":\"Collaborated track in GarageBand\",\"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\":\"Easygoing\",\"is_stream_gated\":false,\"stream_conditions\":null,\"allowed_api_keys\":null,\"is_download_gated\":false,\"download_conditions\":null,\"title\":\"My Song Lusin Smart Strings\",\"duration\":268,\"audio_upload_id\":\"ffad52c4318d3847658ea1785bf80fa3\",\"track_cid\":\"baeaaaiqseb7jj2cjpstz7jo27c4kbcsx4rkzjshznkop6pwhluyfcofjjzk24\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsebh7wfikicucydl5txw54nwh26kwfqcfqo4lpcbqtkc2e4skkov6a\",\"orig_filename\":\"My Song Lusin Smart Strings.m4a\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":120,\"is_custom_bpm\":false,\"musical_key\":\"A major\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":850416615,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqseboqeuc4ndb63mrjdyftlzucuz3n3fte4swgqxfdau3xunilz5ah6\"}}",
    "nonce": "0xd93d06b604283f3679da5fab31295f68c99281b3a5969214cd5db1a26556c9df",
    "signature": "0x896754c97b74f1d7eba8e8206b2f7114ae604fa2d6895ecbe81c63a9775a427e4644ec5d30d5d5d2aee55aac3fda90036570cc3d8a2745f5393c7e0c181f9fea1c",
    "signer": "0xB57F94Ef9a26d73E8b35D3f37FccD18BcC7eeE00",
    "userId": "850416615"
  }
}