{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040012",
    "entityType": "Track",
    "nonce": "0x349b984df35274f617d3b6b159815dc4525a6c12c3563d5a2c9372cac486613b",
    "signature": "0x7888dc5c0ceca9b7ec45cd106ce213615c65ef820c904c3115627336e59c095e5c37c0f52eb2bcfe30d5eeb30834954d49707969e3cdf0ca30f4111a374f6cef1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}