I don’t think this is something special.
The idea is to use your own ajax. In this ajax you will send the id of the row to be updated. In the success function you can either modify your response or use the one send from server (depending on your server code). Here you can use setRowData method to update the row.
The code can look something like:
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functionupdateRow(id){
if(id){
$.ajax({
url:"updateurl"
data:{roid:id...},
dataType:'json',
success:function(data,status,xhr){
// suppose the data is redy to be used in setRowData