{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416055506",
    "entityType": "Track",
    "nonce": "0x422ecc45e9654330ae885c2879537bf1c51d91e773c68ce5af0b730f73ddf759",
    "signature": "0x9eb9118489d47b29f735a408e773aed186958bb90fa30168071ebb69959d4d1442e19af9e903e2c02c5f72b24a6a214272a57bd4c1ea6e9b4a2638a6a51967311c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}