{
  "manageEntity": {
    "action": "Save",
    "entityId": "754634",
    "entityType": "Track",
    "nonce": "0x3cd0253d7c7411a0eb8586da6e0f8ebb53311cc4d86f47b87ddfbfb31b40f1f0",
    "signature": "0x1f977fc29de620a004740bf497ba800996ad2225cb09c3283a188805d277e39a703407df05dc33b3c075f896f9d6bf0faae08dec400024f05590448c8bcdc4481c",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}