{
  "manageEntity": {
    "action": "Save",
    "entityId": "1253253167",
    "entityType": "Track",
    "nonce": "0x1620cf01218301ebb921b4b9cdc27e96f78bc0922a15bc8caafdec5aef60cdd1",
    "signature": "0xaed9f1e6c9a982c5281a1de7d11626b52cacdc1bf263a42aa9fb09a9a45cd5c13e421a60ef095e7f684717a4214c2299371d1758faf9ee1098778a1af58a9bf81b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}