How can I push in a mutation query?

mutation {
  updateDataset(
    id:"cjcpru78oky7c0134oliodyku",
    dataRows:[
      {
        organizationId:"cjbzy5qvw019o0134bhhdpzo8",
        rowData: "test",
        createdById:"cjbzy5qxs019r0134qepn57xh",
      }
    ]
  ){
    id
  }
}

Removes all the current dataRows and replaces them with the new one. However I want to "push" this new dataRow onto the list

@Dan normally I think you're supposed to post questions to the forum. I think you might have to download the list and push your new item on to it before sending your mutation