{
  "manageEntity": {
    "action": "Save",
    "entityId": "2128278182",
    "entityType": "Track",
    "nonce": "0xf2a9e774bf10430ed8ff2a08500dd45ceb306a9d7ff1c320f635b4064b35a4cf",
    "signature": "0x904bc31085e6daaffb39c256e6b671aec44b4e49b2a19c52ac37cb93c5fdae6902bb6c82133085992f9c6537810892a4b9e305ca934e00e73828b1cfed434f711b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}