{
  "manageEntity": {
    "action": "Save",
    "entityId": "1659009774",
    "entityType": "Track",
    "nonce": "0x2ce16429ccdde3690aded3cecbd249e4423fd3228a67620193087b7c160f510e",
    "signature": "0xe7fc5660f8652060d6e48a0b0d91744ea92c5a9c110f44d8e7555a60fefd1414354b0b4462520d05f77b6cf1e19d483924880132c7da4cf0dedda276ee4efd8f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}