curl --request GET \
  --url https://api.fourthwall.com/open-api/v1.1/memberships/series/posts/{id} \
  --header 'Authorization: Bearer <token>'

{
  "id": 123,
  "title": "<string>",
  "episodesCount": 123,
  "postsIds": [
    123
  ],
  "description": "<string>",
  "coverImage": {
    "url": "<string>"
  },
  "thumbnail": {
    "url": "<string>"
  }
}