{
  "manageEntity": {
    "action": "Create",
    "entityId": "1840381949",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":1840381949,\"description\":\"photo by gu-ko\",\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"Electronic\",\"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\":\"Tokyo Train\",\"duration\":190,\"audio_upload_id\":\"17db5184aadb84bb29e7d0216433d850\",\"track_cid\":\"baeaaaiqsebybdwqqnzyhztca4j7vivaqackfa6smljzvl5nxq7hbyid5322fg\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsediytunxdktwey3tc72hcbc4nau3ysz6on6iv23uunybwj6nvrsgi\",\"orig_filename\":\"96_Tokyo Train.MP3\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":96,\"is_custom_bpm\":false,\"musical_key\":\"D minor\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":633421399,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsedgdnid3yehvqemqxmp7v5yqcy72xgf2emq3f4ef7vpmfrat77niw\"}}",
    "nonce": "0xaf0d330299db75a63485e37bfcaec145923fca8c5b83c44b917b5610681819a2",
    "signature": "0xfa62a62db84288460f0e8d93954a9ea08a2930e2b52748bfa16f49bba9b29d4b03a2b7ad0e9211feb24f826071a7155ffa02eb6fab406474d02bcf74a0a4f4181b",
    "signer": "0xB78112c8f9509b795e2a9eb412066545A61f51f2",
    "userId": "633421399"
  }
}