{
  "manageEntity": {
    "action": "Save",
    "entityId": "533952",
    "entityType": "Track",
    "nonce": "0x1933e2187397223991f74990ea7880817d06e27e599bacc33d61a0d6a29c5fbc",
    "signature": "0x59046ec5ca1109e87fcd05423438d015a461fcf477c52f6b21f038067eb84e300e61ab24cb58a1908cef38f6f07eee5494f3bf56c5682f88f86f729e22aafb1f1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}