{
  "manageEntity": {
    "action": "Create",
    "entityId": "1294493146",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":1294493146,\"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_17\",\"duration\":1735,\"audio_upload_id\":\"10e9c934e42b763e540cd187e1c98e32\",\"track_cid\":\"baeaaaiqsedb33ibnmojzve4vdcqnumsjfzilxnzj7l3k6pzzflo322ubexsmi\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsednlaaa4aabkfzdofr2k2zapg4bkfb7hddnn6xzkkiumk2tl5yo5e\",\"orig_filename\":\"9781442329805_Unit_17.mp3\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":true,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":107,\"is_custom_bpm\":false,\"musical_key\":\"A 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": "0x75cc5d53cbea75502e7aded7c5817dc9f6d16a3e153ce30928fa19109f2f3afa",
    "signature": "0x40a12c7a801a63368980ada7ff21367057c14ae34a77346708d96f0b7e243e2f4bce3dcf522141a84d1f3214666e12d408dd71aed17a11e3c2a99379f6fec6081c",
    "signer": "0x44372f1010E4CC58A32eC42c0761e4E659De0941",
    "userId": "120826721"
  }
}