curl --request PUT \
  --url https://api.example.com/v1/crm/requests/{request_id}/weekday/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "request": 123,
  "request_inventory": 123,
  "client": 123,
  "work_days": 16383,
  "rest_days": 16383,
  "rest_weekdays": [
    123
  ],
  "custom": true,
  "exclude_rest": true
}
'

{
  "id": 123,
  "request": 123,
  "request_inventory": 123,
  "client": 123,
  "work_days": 16383,
  "rest_days": 16383,
  "rest_weekdays": [
    123
  ],
  "custom": true,
  "exclude_rest": true
}