Sending POST request with JSON data in DJANGO and response from view also JSON data but its giving 403 FORBIDDEN error

I am trying to send a POST request to Django with JSON data in it and the view is returning response with JSON data. But when I send a request to it, it returns with 403 Forbidden error. I am using RESTClient to send/test POST requests.

I have read all about CSRF in documentation but its not very helpful. I am fairly new to Django and the other questions posted here are not helping me a lot.

The code in my view is:

from django.shortcuts import render
from django.http import HttpResponse;
import json;
def index(request):
        if request.is_ajax():
            if request.method == 'POST':
                print 'Raw Data: "%s"' % request.body;
                reply = json.loads(request.body);
                return HttpResponse(reply);
            else:
                return HttpResponse("OK");

        else:
            return HttpResponse("OK");