{
  "manageEntity": {
    "action": "Save",
    "entityId": "765810",
    "entityType": "Track",
    "nonce": "0x2ecf235ab9e770607d015e75fe13a253330f9e0bb7f3d105465258e001214483",
    "signature": "0xa96bd6bcaf33f635c04f19d56ba1023e4be6dea48cfe04fd3a404011f87084d365f81defe791604396cc357dbb6b0827118dbc19c80df3b797ff40023b72ac941c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}