Facing issues in Solarwinds - Slack Integration using Curl

I have trying to integrate slack with solarwinds (using cURL) and facing issues.

I have watched the lab episode 40.

For now I have tried two scripts:

One for Interface down for a particular node.

Curl Path-X POST --data-urlencode “payload= {\“channel\”: \”#it-solarwinds\”, \“username\“: \“OrionBot\“, \“text\“:\“Alert - Interface: ${N=SwisEntity;M=Caption} status changed to ${N=SwisEntity;M=Down}\nView: <${N=Alerting;M=AlertDetailsUrl}|Details>, <${N=SwisEntity;M=Node.DetailsUrl}|Node>\nTo acknowledge click <${N=Alerting;M=AcknowledgeUrl}|here>\“}” Slack incoming webhook URL

And the other for interface admin down for a particular node.

Curl path X POST --data-urlencode “payload= {\“channel\”: \”#it-solarwinds\”,

\“username\“: \“OrionBot\“, \“text\“: \“Alert - Interface: ${N=SwisEntity;M=InterfaceName} on node ${N=SwisEntity;M=Node.Caption} has status of ADMIN DOWN. \nView: <${N=Alerting;M=AlertDetailsUrl}|Details>, <${N=SwisEntity;M=Node.DetailsUrl}|Node>\nTo acknowledge click <${N=Alerting;M=AcknowledgeUrl}|here>\“}” Slack incoming webhook URL

When I test the alert it says execution successful, however don't receive an alert in Slack. 

Can someone please help?