{
  "manageEntity": {
    "action": "Save",
    "entityId": "190000",
    "entityType": "Track",
    "nonce": "0x5eb178333a15de5a991b0c0d5bc68c2ab089e199ec82040a25b09ac46096bff4",
    "signature": "0x4b6754243d7b8f8d8b92a8d4eaddccfb1b76880fa5ab439cf58f3c16db472a0b7b221dd20608092289754b47bb16def97d928d878f96669945079c8c19701a781b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}