curl --request POST \
  --url https://api.example.com/conversations/ \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "<string>",
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "context": {
    "entities": []
  },
  "last_assistant": "<string>",
  "associated_entity_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "title": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "context": {
    "entities": []
  },
  "last_assistant": "<string>",
  "associated_entity_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "lease_epoch": 123,
  "last_user_message_at": "2023-11-07T05:31:56Z",
  "summary": "<string>"
}