{
  "manageEntity": {
    "action": "Save",
    "entityId": "593249253",
    "entityType": "Track",
    "nonce": "0x543efceadcc72f492fd0bd991d75734b7b1d6daff7fb49c45f023d30949ffa55",
    "signature": "0x064fb326b4cf44b8cce42bed230b0ddb0aef4b66f3c0b4a3fcf9364cd1e8bacc12dcd82aa3c96c0386ce1b2d96d702abfaf9d929de9ec4e6fd578704ecc32c691c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}