{
  "manageEntity": {
    "action": "Save",
    "entityId": "860488",
    "entityType": "Track",
    "nonce": "0x87c2e3944cba539dd05b53d41ef63f4a272d996a9b1a936eda73e18c236ceb61",
    "signature": "0xf678e913f04ebd5c30a227eb1bf7dab9ce875c268cbae7819955e38fbed1ce7d07a5d4e49eaab88d1409a8699c920f6d577b11c7cf616ef78ba392f4fee8269d1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}