Free: Syntax with basenode, subloop

Challenge:
Syntax with free plugin for a JSON like this http://api.json-content-importer.com/extra/json/lucvg.json
Syntax:
[jsoncontentimporter url=http://api.json-content-importer.com/extra/json/lucvg.json basenode=overview]lastUpdateTime: {lastUpdateTime}
{subloop:lifeTimeData:-1}lifeTimeData.energy: {lifeTimeData.energy}{/subloop:lifeTimeData}[/jsoncontentimporter]

In Action:
lastUpdateTime: 2021-02-19 22:48:59
lifeTimeData.energy: 245661344