How to add keys to content body variable when display data d

I work on angular 7 app I display data and column headers dynamically

I show content data without header by using content Body Variable

but problem I face is cannot catch data values or catch data cell values so that

I need to add key to content body

my ts code

this._displayreport.GetReportDetailsPaging(this.searchData).subscribe((data: any[]) => {
this.reportdetailslist = data;
this.headerCols = Object.keys(data[0]);
data.forEach((item) =>{
let values = Object.keys(item).map((key)=> item[key])
this.contentBody.push(values);
});

to get contentbody data I do

Result Returned

ReportId onlineurl reportdate

1222 localhost:5000/ 12-12-2018

data current for content body displayed on browser console as :

0:["1222","localhost:5000/","12-12-2018"]

Expected Result i need to content body display as below

0:[{revisionid:"1222",onlineurl:"localhost:5000/",reportdate:"12-12-2018"}]