{
  "manageEntity": {
    "action": "Create",
    "entityId": "205904087",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":205904087,\"description\":\"\",\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"Pop\",\"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\":\"眼宮 / 前園純ノ介\",\"duration\":46,\"audio_upload_id\":\"8c45acf16c0dfc98a424049e92853ac7\",\"track_cid\":\"baeaaaiqsearxptl4f7euvkflhr3vpp3t6sl5zr6p2vlp5ru7ejbbve4ypnn6o\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqseauff5rvwpfd25djk7qiguybhatevcfeqfyktzfgtm2qcziiwom2u\",\"orig_filename\":\"眼宮.mp3\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":118,\"is_custom_bpm\":false,\"musical_key\":\"A major\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":392916338,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsedcd7k5lneifnkim26bt5razwc33tmqlzus5lehql75dq5awter4s\"}}",
    "nonce": "0xbfb9d29c201f096fb5c9e2d931bf7cca735ac951256040c3f1a2af18e47e3ec1",
    "signature": "0xde745388c274b46258de431606c2656636200efc8d7ba8362a6c9ae63c81645017f001e37eabed7f4420911f9c54bf18adc45f574bd4f675acb6f0dd443ad61c1b",
    "signer": "0x654f1b2DCF5eE0f42af2618ba269C1C8f8327BCA",
    "userId": "392916338"
  }
}