Add message
POST https://api.pegasusgateway.com/alerts
Request Body
{"tuuids"=>["8b5654cc-53f9-11ef-8ea3-0a24e4abd6b7"], "message"=>"Message up to 2000 characters."}
POST https://api.pegasusgateway.com/alerts
{"tuuids"=>["8b5654cc-53f9-11ef-8ea3-0a24e4abd6b7"], "message"=>"Message up to 2000 characters."}