{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045046",
    "entityType": "Track",
    "nonce": "0x6530bacbefefa86afee2df9dbd0e3da527bed2e84b748fa4511cc692b9de87e1",
    "signature": "0x53c155e9f55168b46efa73417d81e8afc7a43261610b736ef84fb7eb04862f7077fad6a4fa25661da8e3511b4a5fc403a08ac4996dc95982200c9aff66128ad41c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}