{
  "manageEntity": {
    "action": "Save",
    "entityId": "1330328215",
    "entityType": "Track",
    "nonce": "0x18aee7e0991535b63d17e68dc74eb9a757a1e1cec131b8e9cd33bc58331c0ca3",
    "signature": "0xf9bb61b2eeb117c522289aded1a3656ec8ddc9dd0f245dd2842255c8f6915d132bf29a19f9dcc8349789a2cb2987e0eaad094afed08dbeaaf6a911a7aac9ff221c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}