{
  "manageEntity": {
    "action": "Create",
    "entityId": "1815351480",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":1815351480,\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"Electronic\",\"isrc\":null,\"is_unlisted\":false,\"iswc\":null,\"license\":null,\"mood\":\"Tender\",\"is_stream_gated\":false,\"stream_conditions\":null,\"is_download_gated\":false,\"download_conditions\":null,\"release_date\":\"2026-03-26T18:00:25.000Z\",\"title\":\"變奏的愛之城 (Drum Mix)\",\"duration\":282,\"audio_upload_id\":\"03b78f5db3929def6c9f554cc49d90da\",\"track_cid\":\"baeaaaiqseasy4wob62sqrhccjbflyfon7t4melyworpeasm7xshifh5prbpp6\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsebtuq3e65go6w7imhw4rez2ri3mqjzue6k2rlyt2yadv745fxctyg\",\"orig_filename\":\"變奏的愛之城 (Drum Mix).wav\",\"is_downloadable\":true,\"is_original_available\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":131,\"is_custom_bpm\":false,\"musical_key\":\"E minor\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":111702289,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqseaaxliqxm7dmwt5zvxsc4omecvcv4vzlxmljbakqcvexj6nddhtle\"}}",
    "nonce": "0x5f99391074a6263b1af9489a6eee8bfea8f281ae6b158b8249cae15d4930dfe8",
    "signature": "0x286101cb1013ce17c2b419e4309a2ec5b8d1a0367e7a4458f111da18a3e95eec50990ba284fdae254019394b3226de5ee03203b9b1231bc636ebcb40b3429c461c",
    "signer": "0xbed99520306BB0dDd2790eD133a58c5eC1bFCE31",
    "userId": "111702289"
  }
}