{
  "manageEntity": {
    "action": "Save",
    "entityId": "192759044",
    "entityType": "Track",
    "nonce": "0x5c9d303ee29c2cf6e04e4392540a52384edcdb884e5448ff59f5feb547934227",
    "signature": "0x33d65f980ab90a04e7bbfe45d372050300ed403773f46ff689a170d3433b32db794761595c4f14bd71f7b19fd18cd4aa27b852dd6df5ac37248e9f5c1174df571c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}