curl --request POST \
  --url https://app.fliqr.ai/api/pipelines/{pipeline_id}/opportunities/{opportunity_id}/comments \
  --header 'Content-Type: application/json' \
  --header 'X-ACCESS-TOKEN: <api-key>' \
  --data '
{
  "content": "This is a comment"
}
'

{
  "id": 123,
  "data": "<string>",
  "created_at": "2028-02-08 12:34:56",
  "created_by": 123
}