gistfile1.txt

   var key = 'E18EFDFD-ACC4-42CB-8261-E8139886DA1C';
    var value = 'foo';
    index.set( key, value, function(err, context) {
            if ( err ) {
                console.log( err );
                process.exit(0);
            }
            else {
                console.log( "successfully inserted " + content.key );
            }
        } );