{
  "manageEntity": {
    "action": "Save",
    "entityId": "1374772346",
    "entityType": "Track",
    "nonce": "0xc127f9061f1681f2f8c7ea41284a8667a06a883512432d7fd408407ce2bbba91",
    "signature": "0x4a0c4aa5932b35e7ce967d2ba6d7f223f7e401418407f4e439f5f3f33de37269543af1423735efdbb07c4a8acb5fefcb36b56f4bf20b183e0a186524487ef7b51b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}