{
  "manageEntity": {
    "action": "Save",
    "entityId": "1126652",
    "entityType": "Track",
    "nonce": "0xb1e42c6208bb0569ce4c03b34f536af6d7ab60cfc94fd5596346a19d0687987d",
    "signature": "0xfcdf397ff2424964d8ea9321dc5036cdb3b9ddc529aa8a61947e0f345b794549168538792318531341651ae4c8e9105e262a23b1206539c7a77b8b67ddb469881b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}