{
  "manageEntity": {
    "action": "Create",
    "entityId": "248643367",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":248643367,\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":false,\"play_count\":false,\"remixes\":true},\"genre\":\"Pop\",\"isrc\":null,\"is_unlisted\":true,\"iswc\":null,\"license\":null,\"mood\":\"Peaceful\",\"is_stream_gated\":false,\"stream_conditions\":null,\"allowed_api_keys\":null,\"is_download_gated\":false,\"download_conditions\":null,\"release_date\":\"2026-07-09T15:00:00.000Z\",\"tags\":\"kogka,jpop,ai,ballad\",\"title\":\"双極の愛\",\"duration\":200,\"audio_upload_id\":\"810f82d834c7120c36b915467abc6cf5\",\"track_cid\":\"baeaaaiqsec52oxdm3kxfupjxmluxchkxucd5ywcvymwjveh6ajg4b5lbz7u3w\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqseanf5h67a5uh7qerpa46rjkh3xhyibsezogz2gubz7xdowkchzx44\",\"orig_filename\":\"K0313_双極の愛_Mixdown.mp3\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":true,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":131,\"is_custom_bpm\":false,\"musical_key\":\"A minor\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":true,\"owner_id\":851914601,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsebig2ducx4rl2bnfpcjytt7boarpsd2tf2cia2acmelbfi2ufvjki\"}}",
    "nonce": "0x36ad2482ee18a2e7d03af63ab4b2804fa873f152a17e82fcb1fb62b14eafc168",
    "signature": "0x33ecf2a54ecc6f7d5217174bf77d2fad0dfb2e72605b2aa5499baaa5763c08dd35409ec3e6ea79aec453edea04fbf286be58d4e58bda340e50d61f7b56a885851c",
    "signer": "0x9a95E87e27E17D9A64b59102A5D563d705e460e6",
    "userId": "851914601"
  }
}