curl --request GET \\
  --url https://voip-middlware.superu.ai/audience/aud_01HXR9V5S7W1S0Q4H4PDTGM43B \\
  --header 'superU-Api-Key: YOUR_SUPERU_API_KEY'

{
  "status": "success",
  "audience_id": "aud_01HXR9V5S7W1S0Q4H4PDTGM43B",
  "audience_name": "Demo Audience",
  "audience_description": "Leads from webinar",
  "contact_count": 32
}