curl --request PATCH \
  --url https://api.withallo.com/v2/api/conversations/items/{id}/summary \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "content": "# Summary\n\nCustomer asked about pricing for the Pro plan and confirmed a follow-up call next Tuesday."
}
'

{
  "data": {
    "id": "cll-abc123",
    "content": "# Summary\n\nCustomer asked about pricing for the Pro plan and confirmed a follow-up call next Tuesday.",
    "version": 4,
    "updated_at": "2026-05-12T14:32:11",
    "updated_by": {
      "id": "usr-abc123",
      "name": "Alex Kim"
    }
  }
}