{
  "manageEntity": {
    "action": "Save",
    "entityId": "759079",
    "entityType": "Track",
    "nonce": "0xdc4e31eae54e2cbd202844eec33aa937508f024d6ba8e06e92080a0b184993bd",
    "signature": "0x7adef678f9528e6496d4af95e075b9193732c602c6612a918a42721fa192b68408895b16ca7dfeb42697f6175147604c5e7571c728c5f44053c546210bf95afa1b",
    "signer": "0xD2F2E85916598FFb221B3d399A164cD39bd24DD7",
    "userId": "132339661"
  }
}