curl --request PUT \
  --url https://api.gptmaker.ai/v2/custom-field/{customfieldId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": "<string>",
  "name": "<string>",
  "description": "<string>",
  "jsonName": "<string>"
}
'

{
  "success": true
}