{
  "manageEntity": {
    "action": "Save",
    "entityId": "2102959918",
    "entityType": "Track",
    "nonce": "0xc335616e93b284260199ed29086a3d2ba744f17795e0c9ae2d52c5bc48db1e37",
    "signature": "0x5d7d65042f0ca6a8bd8e2ae72f12ad17afc1d1766494f36145ed6d894dd7a6f926c46538b963a9ab1792e572065421f4637914f8db384bbcc06eab2db56d02911b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}