{
  "manageEntity": {
    "action": "Save",
    "entityId": "1069571234",
    "entityType": "Track",
    "nonce": "0x5ce288bee624c1e9319c174946bc26ecd9ed38bd1c19160ccf514c7ff2a7bd93",
    "signature": "0x752a8cbbbf555edeadcd54e80cbed33039f9ac97db6aaa1e33df527674bbc9c4595c520edec2788bfdf213672df832b7f4b91da2ad651580ec3d2e8b347478531b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}