{
  "manageEntity": {
    "action": "Save",
    "entityId": "1782762297",
    "entityType": "Track",
    "nonce": "0x44e8fcd238967373cb06e25f1378342599f4e95d66956626e8df7e5c087372ef",
    "signature": "0xf29119a771a66eaf607a0d6c757d7d8d1fb480b5498943b953803291243149f965b28825f5a3d59eef250e13ae50515570d3adfb2c970c6227a84d440275abf41c",
    "signer": "0x375963f281CEdF4D9D180496F80A256D574daBa2",
    "userId": "981824750"
  }
}