{
  "manageEntity": {
    "action": "Save",
    "entityId": "1559680331",
    "entityType": "Track",
    "nonce": "0xe50306b5ce1e91f7ebb4b6559c75e440ac1d7ec8bedf4674486158a25f71185b",
    "signature": "0x061ee3be6f11f460198dcf9c87b2d0e5d9312c8e4f851562fb62e2193e9c723f140232143355022dc78f14ed7de3e7e1985c2290a15a8e97b91b06a4d52e5f7b1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}