{
  "manageEntity": {
    "action": "Save",
    "entityId": "1453425787",
    "entityType": "Track",
    "nonce": "0x98fefdd856ad1d1a4004a1ae6495de69b9f97237047d349573718334c73970a7",
    "signature": "0x395f10fd3b8a4bd458c560eae8747ed9b0194c1b30d9754c46ce4d97589159b90834105739e48925036eed0a3c9df1afac85fc3780759c7fb5935c0d601e2f831c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}