curl --request POST \
  --url https://api.helicone.ai/v2/experiment/{experimentId}/prompt-version \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "newHeliconeTemplate": "<unknown>",
  "parentPromptVersionId": "<string>",
  "isMajorVersion": true,
  "metadata": {},
  "experimentId": "<string>",
  "bumpForMajorPromptVersionId": "<string>"
}
'

{
  "data": {
    "id": "<string>",
    "minor_version": 123,
    "major_version": 123,
    "prompt_v2": "<string>",
    "model": "<string>",
    "helicone_template": "<string>",
    "created_at": "<string>",
    "metadata": {},
    "parent_prompt_version": "<string>",
    "experiment_id": "<string>",
    "updated_at": "<string>"
  },
  "error": null
}