Currently, I have an objective for a quest that looks like this:

'1':
type: ACTION
block: '323'
click: 2
location: 399.00;89.00;48.00;world;0.00;0.00;
range: 8

However, this does not work; when I right click a sign at a location 8 blocks away from x=399, y=89 and z=48, the objective is not completed.