curl --request GET \
  --url https://gateway.polymarket.us/v1/subjects/{id}

{
  "subject": {
    "id": 123,
    "name": "<string>",
    "displayName": "<string>",
    "description": "<string>",
    "subjectType": "<string>",
    "image": "<string>",
    "color": "<string>",
    "darkColor": "<string>",
    "createdAt": "<string>",
    "updatedAt": "<string>"
  }
}