Thanks @PrashantLearnIT ,

I used this your login and used this code and it worked.

var gr = new GlideRecord('cmdb_data_management_task');
gr.addEncodedQuery('numberSTARTSWITHCMDBTASK0001187');
gr.query();
if(gr.next()){
     gs.print('in the if loop gr is: '+ gr);
     gs.eventQueue('sn_cmdb_ws.attestationtask.reassign', gr , '5c6ee44637d05a00ed735ad843990ec2', 'random var2');
     gs.print('after execution of eventQueue');
}