{
  "manageEntity": {
    "action": "Save",
    "entityId": "410813",
    "entityType": "Track",
    "nonce": "0xf47379baf68a33ee458dded38656766872c17a9c20d41efa65af7ae66dfbc9c3",
    "signature": "0x081a32c53041b8364e9cb36a784642adb64c16b7eb9a744de6b63ab3b360e73c7063875d24cab79633d9c711aabdb24a6c8b8b3ac236ae46503b97fa27b204de1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}