convert string to list of lists

I have a long string that represents animation frames. Each frame is delimited by $
within each frame is a information in the form of object:value delimited by * for example:

s= object:value*object:value$object:value*object;value

I'm trying to convert this string into new List.< >(); Is there an easy way to do this?

my current method is to split the frames first by $ then split the frameinfo by * Then use a for loop to put the results into the generic lists...

 function parseStringToLists(s:String){
             animation=new List.<List.<String> >();
             var framedata=Regex.Split(s,"\\*");
 
             for(var i=0;i<framedata.length;i++){
                 var framestrings=Regex.Split(framedata[i],"\\$");
                 var framestringsList=new List.<String>();
                     
                     for(var k=0;k<framestrings.length;k++){
                         framestringsList.Add(framestrings[k]);
                     }
                     
             animations[i].Add(framestringsList);
             }
 }

The Error I get is

The best overload for the method 'System.Collections.Generic.List..Add(String)' is not compatible with the argument list '(System.Collections.Generic.List.)'.