{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359112099",
    "entityType": "Track",
    "nonce": "0x35cef2bbd57d47fb54833bfced9145d9324e8d199aff976b75395dd013ef0642",
    "signature": "0xe4e389c51693aa7f38ab5b63aadb44c6d32988a5128e8279c709be689f7ebdb034bdb458009198d7f3a64b8faca689ee34d476178efcc9ea3e5bb14fbfa171c11b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}