deals/1?include=events&page[events][size]=10&sort[events]=-createdAt&filter[events][type]=notes,files

gistfile1.txt

{
  id: 1,
  type: deals,
  attributes: {
    ...
  },
  relationships: {
    events: {
      data: [{
        type: notes
        id: 1
      }, {
        type: files
        id: 1
      }]
    }
  }
}