{
  "manageEntity": {
    "action": "Save",
    "entityId": "2074657931",
    "entityType": "Track",
    "nonce": "0x1419387d825e9819b940b8371e3c4ab9d5ea39a28e488ddffdf27c34d6cc3b90",
    "signature": "0x4e791f872cda9acc5d5807624d06d95f6ddf9c96e846e0ec8a1a999ad62a93af319e923857161298773182d12a168fe32ef15087265f34cf4e32c79206701a501b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}