{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662031901",
    "entityType": "Track",
    "nonce": "0x046258740fdf19f7ed8d7969afdd5beb0ee328a5ddb5aaa3a3e67576dbdf9585",
    "signature": "0xb0e519708eebc58962185714a39754bdfb0cf96e20d9dddc46199ffff31d419e1374940f093de739e351e0fbb4fdc864a773673baeee84537b984df6e723b1551b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}