{
  "manageEntity": {
    "action": "Save",
    "entityId": "376305",
    "entityType": "Track",
    "nonce": "0x522f5d54d489c7bf70a9562615ef141385c4f593cc16009fce635593b2c26cdc",
    "signature": "0xcb0e317e1d41c8ebc2b58ede6621aa19c033770e1961b75e6e1a708dd03db00b0c45b675b9d19c48536cac73e999b080dbe377ac1bf615f752f153408ba31cb81b",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}