{
  "manageEntity": {
    "action": "Save",
    "entityId": "1468140374",
    "entityType": "Track",
    "nonce": "0x86926a869da1ac1335e5b66173ef876e1fd22f62da99cbcb7451ab219d56a1ab",
    "signature": "0xe0f7c6e4769fb07a61730b01bb944955a5db9f7246a4c594453484f36156e7245d667b524c36e8b80a5ff32e482557315d8477c29d9817383ed425ced46925ae1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}