{
  "manageEntity": {
    "action": "Save",
    "entityId": "222456",
    "entityType": "Track",
    "nonce": "0x6c4e4ba6d4f2b83a19b317586e8dab085fbc580e84117f1029ec8f9f3d2fd765",
    "signature": "0xfe9ee63b2695c730e5a8dca85907b4ae83b948b225a1359760d0fafbd824250a5fe0c91e49c4a6b62a21c280be578bd6351d74952806f654d93fa9332612bcb21b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}