curl --request PUT \
  --url https://bloodhound.specterops.io/openapi.json/api/v2/custom-nodes/{kind_name} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "config": {
    "icon": {
      "type": "font-awesome",
      "name": "house",
      "color": "#333"
    }
  }
}
'

{
  "id": 123,
  "kindName": "<string>",
  "config": {
    "icon": {
      "type": "<string>",
      "name": "<string>",
      "color": "<string>"
    }
  }
}