{
  "manageEntity": {
    "action": "Create",
    "entityId": "663024321",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":663024321,\"description\":\"\",\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"Blues\",\"isrc\":\"\",\"is_unlisted\":false,\"iswc\":\"\",\"license\":null,\"is_stream_gated\":false,\"stream_conditions\":null,\"is_download_gated\":false,\"download_conditions\":null,\"tags\":\"\",\"title\":\"18-your-laugh-stayed\",\"duration\":94,\"audio_upload_id\":\"c256d52ee3dd26c39377f6ddc6fb0170\",\"track_cid\":\"baeaaaiqseailoqzsz5yelxbhx6e2uevv4d75smwmjzq5hx6ft3fei5v7j6l2e\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqseajv4wj4xzuejhfft6fixe5asnqgjk3twxndnw6rysveycbt2qfv2\",\"orig_filename\":\"18-your-laugh-stayed.wav\",\"is_downloadable\":false,\"is_original_available\":false,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":149,\"is_custom_bpm\":false,\"musical_key\":\"B flat major\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":922851773,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqseaelrfubunfwoh7njapxzhtytlr7rln7yqnvsqst62owgu34mjana\"}}",
    "nonce": "0xafeb621e03e433fb7934768d290c1a6aced613ebf82050b96039669b2f677c7a",
    "signature": "0x18ce305d39c0110f6da8ecdca5b6fef55ab01866e176f3272cdc4313c8052c8147b35e97eae6bdfdce43101806d8c044d08fce9ca32dd3717e80309381e4efe21b",
    "signer": "0x435094cF0770083e9861f5626FD3Cb6C0dAd86a8",
    "userId": "922851773"
  }
}