API: Popular Episodes

type Response = {
  success: true,
  result: {
    episodeId: string,
    seq: number,
    title: string,
    podcastName: string,
    podcastSeq: number,
    cover: string,
    // May be null
    epCover: string | null,
    linkType: string,
    // Duration in seconds, may be null
    duration: number | null,
  }[],
}