curl --request POST \
  --url https://rippletide-backend.azurewebsites.net/api/agents/{agentId}/sessions/{sessionId}/messages \
  --header 'Content-Type: application/json' \
  --data '
{
  "message": "<string>"
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "sessionId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "sender": "user",
  "messageId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "created_at": "2023-11-07T05:31:56Z"
}