{
  "manageEntity": {
    "action": "Save",
    "entityId": "142568",
    "entityType": "Track",
    "nonce": "0x9dfbef0aa229562c3051a873cc4448021e741eedac76404e8bea5b7e974cc8dd",
    "signature": "0x77ecfcef48b8e512c67293aa322f706e8a9a69464ac6f79dbdaa000695699a5062eea3bbceecc333bea8816aaf899ee406a73b186b6fa091df2ab2204de67ee61c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}