{
  "manageEntity": {
    "action": "Save",
    "entityId": "1043562",
    "entityType": "Track",
    "nonce": "0x63206dea347af33c15e8d428da72ca68ecb6f2e30a81f0496fba9eda941a57c8",
    "signature": "0x41c6a5b6eb6d19522e122fb8d6c9bb6a86625a04fcd179a600fb526b96b96dd24c313fb1cc04cb74a8b62cf099ad9d182334111d4148d6c24bfa383d89d64cf01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}