{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699504794",
    "entityType": "Track",
    "nonce": "0xc70396982b72fb1bde2b831c0f171bd5073f5b467fc95ca3372e783e191b47b9",
    "signature": "0xf2dd578bfb059263be7573068b08e057877cb263e7e4c063d1a487da3a3915a83f84ff6c9a01eb3ca998c81ffb2754970c1755421326403929ae156206eaeb3f1b",
    "signer": "0xF7F56DF4D8a2Ae2BF9Ca645DC684f84c37BbDaFe",
    "userId": "116272245"
  }
}