curl --request POST \
  --url https://api.egp.scale.com/v5/span-assessments \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "trace_id": "<string>",
  "comment": "<string>",
  "rating": 3,
  "rubric": {},
  "metadata": {},
  "overwrite": {},
  "span_id": "<string>"
}
'

{
  "assessment_id": "<string>",
  "trace_id": "<string>",
  "span_id": "<string>",
  "created_by": "<string>",
  "object": "span.assessment",
  "comment": "<string>",
  "rating": 3,
  "rubric": {},
  "metadata": {},
  "overwrite": {},
  "account_id": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}