Retrieve all StreetAccount filters

Add StreetAccount filters (watchlists, company filters, market topics, regions and sectors) to filter down StreetAccount headlines by the relevant categories. Set the structured and/or flattened flag. If structured flag is set, parent and child filter information will be returned. If flattened flag is set, flattened filters will be returned which can be used with the headlines and createView endpoints. Both flags can be set to return both sets of filters. If no params are provided it will re...