{
  "manageEntity": {
    "action": "Save",
    "entityId": "1346124113",
    "entityType": "Track",
    "nonce": "0x66fb5ba8bc42bc2c08c326005a6f1f505788574f41ff7a8fdcd076e476b785b8",
    "signature": "0x804f4e21b4244d89d9d021bcdca7985427902384c1211fda8145ec26e8ff8f0177182466b2466d41c44cdf463f94e27ddb505fe576716c5b67f31a77d461bed01c",
    "signer": "0xe270C91f9476B885124d6c0208211213dC10036a",
    "userId": "94825285"
  }
}