Pass (Send) data from Angular to Node rest API

Hi,

I tried to send variable data from the angular ts file to the nodejs api but I am not getting any response.

in my ts:

public data="test"; 
this.http.post("http://localhost:3000/api/v1/upload/",this.data).subscribe(); 

and in my nodejs server.js I have:

var app2 = express();
app2.post('/api/v1/upload', function(req, res, next){
     var data = req.body;
     console.log(data);
});

but I am not getting any error and I am not getting anything in console.