{
  "manageEntity": {
    "action": "Save",
    "entityId": "1126953",
    "entityType": "Track",
    "nonce": "0xa8774e740830116e915d5672a59fc7d17ac5ba04331ab1b7bd46ed9c326de749",
    "signature": "0x909a716fbc7d5cf95c3c1c27cb6808547f815eb673c4cb25b7b1d6d56dc84dca4eae63cb10d48a6039fac9dec158500f0164f71ac8ba6bc25eff638ffa366ba01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}