{
  "manageEntity": {
    "action": "Save",
    "entityId": "1497942588",
    "entityType": "Track",
    "nonce": "0x896c00e04fac092a57316e5f1371d10c111681e1de4ac819b350e3be097abbae",
    "signature": "0xe5dbea93df2b2486d959411cd61efa38b0a2a915b93b744175b0e8cd65474b6c351739eb550f0dce5ab88c8f2add3de0e5e411973214250346349d1b6eb2fd5d1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}