curl --request POST \
  --url 'https://api.nsr.stateset.com/api/v1/sessions' \
  --header 'X-API-Key: YOUR_API_KEY'

{
  "context": {},
  "created_at": "string",
  "focus_entities": [
    "string"
  ],
  "last_activity": "string",
  "session_id": "string"
}