{
  "manageEntity": {
    "action": "Save",
    "entityId": "249509881",
    "entityType": "Track",
    "nonce": "0xad53b92c2728cd05a1b2e2bbffd08157570b81a90d4d7fc275c805b145c45278",
    "signature": "0x38b618cf78f14378b67e07f6d825feb3396b4995c57f33b5b1fd154f3d8142c95fc5c45d900aa0205e868bb1df13712fb5010387ace492d5fd16a8edd2a365401c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}