{
  "manageEntity": {
    "action": "Save",
    "entityId": "852890208",
    "entityType": "Track",
    "nonce": "0x0460df1ad7616169e53d05b13ea1645a3bae529c8969a13607763b4ab838a300",
    "signature": "0xd864a25b40f7086673b9388fe1831bd9b406abfb12ddee076ddc33e83c53ce9c0b019cfa6854fec3bccc7515f4974698b317f0ebce5977fde73509344f03314e1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}