{
  "manageEntity": {
    "action": "Save",
    "entityId": "1227983576",
    "entityType": "Track",
    "nonce": "0x467689a8d7ce8d61fe586c17f7d741e202d0492930fb83853189e4958011eafb",
    "signature": "0xa798a00f2f8dd0d43d70bdbcbf16c2edad719dc62787edd65638e9059286cb2f2101d59675ef415be8ae3c3cbdf550cde88667a59e35a137666c842e94dbc5971b",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}