{
  "manageEntity": {
    "action": "Create",
    "entityId": "471002837",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":471002837,\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":false,\"play_count\":false,\"remixes\":true},\"genre\":\"Audiobooks\",\"isrc\":null,\"is_unlisted\":true,\"iswc\":null,\"license\":null,\"is_stream_gated\":false,\"stream_conditions\":null,\"is_download_gated\":false,\"download_conditions\":null,\"title\":\"9781442329805_Unit_21\",\"duration\":1667,\"audio_upload_id\":\"e18834f303e731434631c08b125d6598\",\"track_cid\":\"baeaaaiqsebz6pdk3rtnyosq7tw4xhe7odtl2md3h5ctfnvhqpsljclamvib4g\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqseax2lgef6r3d4ir3lpiymdqk6vhw7rbj7pctnyninwtxx5jhgj7qo\",\"orig_filename\":\"9781442329805_Unit_21.mp3\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":true,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":122,\"is_custom_bpm\":false,\"musical_key\":\"E flat minor\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":120826721,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsebywt65kqbd75ep3nb5d6mzv27noeiskdc54a3tgw5kf5u6hle3ic\"}}",
    "nonce": "0x0b9aec5844e8536056fb3fa9587e631816dacd57c02ee4b1e62015e5af1af5f8",
    "signature": "0x0dc3749e68363129b554cf3b82e50be510056b7ddaedf768b0753dcb324deaad2bc4f63eb2388ffb0095c9d9b5fdd1c98cc101efa4db42407fde5f89da4e1dc61b",
    "signer": "0x44372f1010E4CC58A32eC42c0761e4E659De0941",
    "userId": "120826721"
  }
}