{
  "manageEntity": {
    "action": "Save",
    "entityId": "1057719",
    "entityType": "Track",
    "nonce": "0xcfbc27858a0a6885daaaac93f00cbec9490eaa27edf4435b4910b4d6ed05edf2",
    "signature": "0xe11c740c48ff86fe6b0625ad966d4284ad622c5e9702b7655d4d0dddf354748e54b0f5c93a11cdfdc9a8654d2c11462f251240535a61623b85fa729ae53ddb031c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}