{
  "manageEntity": {
    "action": "Save",
    "entityId": "513108",
    "entityType": "Track",
    "nonce": "0x6b9663e6b71d22af612b6796b84597283d96052f3f8ff83d1864f6f203e3cd07",
    "signature": "0x09fdb73d941c943b41f1fcc5f455a978584afd2265834109e355ffbc966a50d745099f92991a1e6cfa2fc6925f6aa0ce5c276cc3dbdda552f783f9b45eef49471c",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}