Adding Agency / Department filter on the API request URL

Using this guide, https://open.gsa.gov/api/get-opportunities-public-api/ it appears that it is possible to add a parameter to filter by department or sub-tier. Can anyone help converting this search string to an API request format:

https://beta.sam.gov/search?keywords=&sort=-modifiedDate&index=opp&is_active=true&page=1&organization_id=100007448,100012062,100076293,100148640,300000017,100019747&inactive_filter_values=false&date_filter_index=0

Tried using this:

https://api.sam.gov/prod/opportunities/v1/search?limit=100&api_key={MY API KEY}From=11/01/2019&postedTo=11/20/2019&eywords=&sort=-modifiedDate&index=opp&is_active=true&page=1&organization_id=100007448,100012062,100076293,100148640,300000017,100019747&inactive_filter_values=false&date_filter_index=0&psc=

Thank you for your help!