tower surveys / how to enter a dictionary variable

Hi all

I’m just trying ansible tower first time. I’m not finding any way of entering a dictionary variable with the GUI. For example, I would like to be able to set the values of a cluster_member variable which has an item for each member

cluster_member:
node1: true
node2: false
node3: false
node4: false
node5: false
node6: false
node7: false
node8: false

Is this possible?

Thanks

Ulises