Using External API to create a Webhook campaign

curl -X POST -d '{
   "apptoken":"YOUR_APP_TOKEN",
   "title":"webhookSmsExample",
   "webhook":"1",
   "broadcast":"1",
   "messages":{
      "8":{
         "webhook":{
            "url":"https://rest.nexmo.com/sms/json",
            "get_params":[
               {
                  "key":"text",
                  "value":"your activation code is \"4321\""
               },
               {
                  "key":"from",
                  "value":"Xtremepush"
               },
               {
                  "key":"to",
                  "value":"12345"
               },
               {
                  "key":"api_secret",
                  "value":"NEXMO_SECRET"
               },
               {
                  "key":"api_key",
                  "value":"API_KEY"
               }
            ],
            "request_body_type":"raw",
            "request_body_data":{
               "raw":"",
               "post":"",
               "json":""
            },
            "request_headers":""
         }
      }
   }
}'https://external-api.xtremepush.com/api/external/create/campaign