curl --request PATCH \
  --url https://api.thehaystack.ai/v2/haystack/speakers/{speakerId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "bio": "<string>",
  "imageFilename": "<string>"
}
'

{
  "speaker": {
    "id": 123,
    "name": "Pastor John Smith",
    "bio": "<string>",
    "imageUrl": "<string>",
    "imageFilename": "<string>",
    "itemCount": 123
  }
}