{
  "manageEntity": {
    "action": "Save",
    "entityId": "1586726030",
    "entityType": "Track",
    "nonce": "0x059c012d86f7ec90565ece2e60a09cf5df7e5c6c1b3f00f1295c1c875a4c2fe4",
    "signature": "0xc9e6133eed32bf355f0598092749195d16ce2ff70d4946bd4b26cf0a4c50fdb977f582b70530c45ddb447e67d923992954e8d70c7d9a06793d5aaff70ea4c7181b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}