{
  "manageEntity": {
    "action": "Save",
    "entityId": "325390",
    "entityType": "Track",
    "nonce": "0x24caab36d67bc95570d7b523385901f30591b678fcc40483d8d97e3869db3dfd",
    "signature": "0xdc4e5b33380e18383b639fa6e2b6fbe15c5149527feafc5f58972497b16d10df773aba2af60502abe6af0fc0347598305d42e33d3e6856f1973b68af3bae4bb71c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}