{
  "manageEntity": {
    "action": "Save",
    "entityId": "711142",
    "entityType": "Track",
    "nonce": "0x9b36ebad5dd8b338d8b9946236edf30800942e0eb4c7cb8910ba63dcec882316",
    "signature": "0x53f6446535f306153edb36e0ae4cef4b258ef28acc292d8d8ad1cde9edc33b2f4a2604c13c39ac1ed70833b18560280ef1f03d9de43971ad25d656e5c779b44e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}