{
  "manageEntity": {
    "action": "Create",
    "entityId": "1077499370",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":1077499370,\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"Metal\",\"isrc\":null,\"is_unlisted\":false,\"iswc\":null,\"license\":\"All rights reserved\",\"mood\":\"Brooding\",\"is_stream_gated\":false,\"stream_conditions\":null,\"is_download_gated\":false,\"download_conditions\":null,\"title\":\"Echoes don't answer\",\"duration\":243,\"audio_upload_id\":\"78fde03bb0b7d0866de257ced11da928\",\"track_cid\":\"baeaaaiqsecq4sx6z2c6kayxzjtnotdoqz5lyt3nw2sat7eelz4kkfdmn5cxn6\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqseciwn3do6w6jp6xkipyzgfupdwsn5m4ncnmvl72h3p37ngxquaxls\",\"orig_filename\":\"Echoes don't answer.mp3\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":107,\"is_custom_bpm\":false,\"musical_key\":\"F minor\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":256479919,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsedsqkj3aot4llgjlv2ytoy2kve7xxcczb7tx5odmibkdeyjknly62\"}}",
    "nonce": "0x75f8fcc1c220f28b5b038567f22c814ca3d592a11c5c8c2b316f8573d3698ca8",
    "signature": "0x6ff34c5a1beba0e0e85b0c954f2f510d61eb32ea9c0c58bcf6f951841da79ae745c57ded4c4dfffb57f26a21b7ce1c0d8747631df5779f300f9841e95cfcc5f81c",
    "signer": "0xc4A500E17D812B285447720CCcb7F8eB148c91bd",
    "userId": "256479919"
  }
}