{
  "manageEntity": {
    "action": "Update",
    "entityId": "1138521797",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":1138521797,\"owner_id\":753406205,\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":false},\"genre\":\"Electronic\",\"isrc\":null,\"is_unlisted\":false,\"iswc\":null,\"license\":null,\"mood\":\"Sentimental\",\"is_stream_gated\":false,\"stream_conditions\":null,\"allowed_api_keys\":null,\"is_download_gated\":false,\"download_conditions\":null,\"release_date\":\"2016-07-15T05:00:00.000Z\",\"title\":\"Souls\",\"duration\":251,\"audio_upload_id\":\"51a9a5aa5442ba8bf100c7ab5e5dc993\",\"track_cid\":\"baeaaaiqsebxfdnubkhh4pib4zjaaefbxh7ff6s32vb4e4cuxnhzxpux6rif7q\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqseczlc3uar7rgobpnfz7ajmslya73yimc2hrqixch3hg7izkcg7e24\",\"orig_filename\":\"[RoL12] Zirex - Souls.wav\",\"is_downloadable\":true,\"is_original_available\":true,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":105,\"is_custom_bpm\":false,\"musical_key\":\"F minor\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false}}",
    "nonce": "0x9e37d4968ca0129c9a66ee8dbcc747fb3b0206916ff65965419c662ee7f92797",
    "signature": "0xd50ee4ee47b5625ae616856dddf62c353ce2c858c5721cd605b9ab603e1a45227c5373ddfca1ba77f330618c5d68b872666dff9e9e43dd58b3b2b59c7799b78e1b",
    "signer": "0xA78Fd746fAA824dCb68b68CC13fA9812a1ff2069",
    "userId": "753406205"
  }
}