{
  "manageEntity": {
    "action": "Save",
    "entityId": "834724711",
    "entityType": "Track",
    "nonce": "0x1a7fc0025862640941161ef1d69db96e1d58a6dea6552052d0fb17d99fcb406c",
    "signature": "0x3c85a8d3f44f1569ce2da8e8b91d912bc34a6d7687178f3f0ee6b4fa339e1122677a0674a815ae48ad9071405446282c05574de56c8b5951f91f3e9fea64d6361b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}