{
  "manageEntity": {
    "action": "Save",
    "entityId": "562828738",
    "entityType": "Track",
    "nonce": "0x86475978c7036cddb07f7c81dd60b6b840b38991bfa705a3b03eeafa390b1538",
    "signature": "0xcbdf7f62db5a756e8a0c8f73971584ed1d65813eb7b58ddbaad5dfc2160cb27e73cce0e1900a3acd53d206c972c1dc6a245ca9f42449af90fd3e420227ab8cb01c",
    "signer": "0x6802Fe39C5FA9f99ac1Aa32F164982185A3E70ea",
    "userId": "152482938"
  }
}