{
  "manageEntity": {
    "action": "Save",
    "entityId": "81349119",
    "entityType": "Track",
    "nonce": "0x685eea2be7a90f2d340208d6cb6da84840be8d989f6954131c8572a59dcf9d98",
    "signature": "0x22aac031bb60b661b67cbd9a85949d130e956f4b70fd277ff1d5ef1ba9639ca4488868afd366a3a444bd689408940bc51fb494d23decca4d84965ed68f70fa081b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}