{
  "manageEntity": {
    "action": "Save",
    "entityId": "658031991",
    "entityType": "Track",
    "nonce": "0x3400f56d1456b4ada169357cbf3519782c91900ffb135d27809ee15ae8d64436",
    "signature": "0x28940f897f8d10085ba6bac8fc7a33e80e3c2af8443e25c1cd731b18caf005cd5b08e782c90fb12145ba14cce098abbbfed2b166ed45fcf4b960965516d4b6461c",
    "signer": "0x9881bA04eA95d8a4De5594aBC9DBd5c96F38eF34",
    "userId": "211307"
  }
}