{
  "manageEntity": {
    "action": "Save",
    "entityId": "739778343",
    "entityType": "Track",
    "nonce": "0xce0a3f89a4b0e3f25af7e8c765e0172be1d283d4c1b85d93a0d46cc5b96e2cb7",
    "signature": "0x80978688b765982495801c9028dddb2294e2cf547a98b5196c1d43d3efdbd0bd57a03ca8c3a44c398f8965f33892b52013d8c7b99a105ed94ff0cbb6c2de68561c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}