from __future__ import annotations
from typing import Dict, Any

def scrub_payload(payload: Dict[str, Any], fields_to_keep=None) -> Dict[str, Any]:
  if fields_to_keep is None:
    fields_to_keep = []
  if not isinstance(payload, dict):
    return {}
  sanitized = {k: v for k, v in payload.items() if k in fields_to_keep}
  return sanitized