Use this this to add new entries to your client-side invisible list. 
You can delete buddies from invisible list using 
SNAC(09,08). 
See also complete snac list for this service 
here.
  
 
 
 |  00 09 | 
   | 
 word | 
   | 
 SNAC family | 
  
 
 |  00 07 | 
   | 
 word | 
   | 
 SNAC subtype | 
  
 
 |  00 00 | 
   | 
 word | 
   | 
 SNAC flags | 
  
 
 |  xx xx xx xx | 
   | 
 dword | 
   | 
 SNAC request-id | 
  
  
 |  
 
  |  
 |   | 
 
  
   
   
   |  xx | 
     | 
   byte | 
     | 
   buddy id #1 strlen  | 
    
   
   |  xx .. | 
     | 
   string | 
     | 
   buddy id #1 string  | 
    
   
   |  ... | 
     | 
    ... | 
     | 
    ... | 
    
   
   |  xx | 
     | 
   byte | 
     | 
   buddy id #n strlen  | 
    
   
   |  xx .. | 
     | 
   string | 
     | 
   buddy id #n string  | 
    
    
   |  
   
 |   
  |   | 
  
 |   |  
  
 |   
 |   
 |