{
  "manageEntity": {
    "action": "Save",
    "entityId": "298811393",
    "entityType": "Track",
    "nonce": "0xddc83b8551a72aef906e5ffa3cd1aa8fcf6d759002e9289c5ff29b7e9e5a274d",
    "signature": "0x08e0786d092de9b722d7396cce672489a3d67aff2024f4b932b9ff7fb693aeaf294eed8ea23af4275427b57d618621af09025b91d2948d94ae3519be26850d821b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}