Create or update a background

curl --request POST \
  --url https://api.wanderersguide.app/functions/v1/create-background \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "rarity": "COMMON",
  "description": "<string>",
  "operations": [
    {}
  ],
  "content_source_id": 123,
  "version": "<string>",
  "id": 123,
  "created_at": "2023-11-07T05:31:56Z"
}
'

{
  "status": "success",
  "data": {
    "name": "<string>",
    "rarity": "COMMON",
    "description": "<string>",
    "operations": [
      {}
    ],
    "content_source_id": 123,
    "version": "<string>",
    "id": 123,
    "created_at": "2023-11-07T05:31:56Z"
  }
}