{
  "manageEntity": {
    "action": "Save",
    "entityId": "89692",
    "entityType": "Track",
    "nonce": "0xe788c93fe0ebf7b56586ccb3588e89cdd280ed6f3abc0a6247edfe9e7cb871c3",
    "signature": "0xfc1f30d1c7c31a7fa45bd40314b871dbb0199ff3e1b468628829255591fc58ab66dca90020653641404730a963c88479793c57ccc2f1b903f77af7275b0b467d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}