README.md in campaign_by_msg91-0.1.5 vs README.md in campaign_by_msg91-0.1.6

@@ -56,10 +56,11 @@
 ### Run Campaign
 
 To run a campaign
 
 ```ruby
-response = CampaignByMsg91::Campaign.new.run_campaign(campaign_slug, request_body)
+request_body = { data: { sendTo: [] ... } }
+response = CampaignByMsg91::Campaign.new.run_campaign(campaign_slug, request_body.to_json)
 ```
 
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. You can also run `bin/console` for an interactive prompt that will allow you to experiment.