Get Content Chunk

{
  "id": "<string>",
  "content_id": "<string>",
  "char_start": 123,
  "char_end": 123,
  "chunk_index": 123,
  "status": "PENDING",
  "error": "<string>",
  "created_at": "2023-12-25",
  "updated_at": "2023-12-25"
}