curl --request POST \
  --url https://api.jelou.ai/v1/bots/BOT_ID/messages \
  --header 'Authorization: Basic <Base64Encoded clientId:clientSecret>' \
  --header 'Content-Type: application/json' \
  --data '{
    "type": "voice_call",
    "header": "Need Help?",
    "text": "Click the button to speak with an agent",
    "userId": "USER_ID",
    "parameters": {
      "display_text": "Call Support"
    }
  }'

{
  "success": true,
  "messageId": "msg_123456789"
}