Need to capture the start and end time of a Data load Rule(Data Exchange) in Groovy Rule.

The Request is to get REST API output in json format like start time and end time of a Data load rule in Data Exchange.

I have created groovy script to extract the log from data load rule using REST API. But in the log it is only giving job Status, executed By. But we also need to capture the start and end time of a Data load Rule. The output will be in JSON format.

Can someone suggest how we can get REST API output like start time and end time from data load rule.