curl --request PUT \
  --url http://localhost:3000/v1/scheduling/deputy/staff/{staffId}/operational-units \
  --header 'Content-Type: application/json' \
  --data '
{
  "operational_units": [
    "<string>"
  ]
}
'

{
  "success": true,
  "staff_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "email": "<string>",
  "name": "<string>",
  "previous_units": [
    "<string>"
  ],
  "new_units": [
    "<string>"
  ],
  "deputy_updates": [
    null
  ],
  "error": "<string>"
}