{
  "manageEntity": {
    "action": "Save",
    "entityId": "1742282767",
    "entityType": "Track",
    "nonce": "0xe609ff0baad4f5ab4d267cff9c381e4422b0ebd1afd977b4953482bad96718c4",
    "signature": "0x9707e61d7854c2152f21be1d54e35cf0264b8d514a58defae5a732a28ab6c0636c7b5a1be328655d0e5a51a78ba54faf11d5bbd7b72b75d2821dae758c57e2421c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}