[Description] Represents the Token returned by the metadata to represent an event. [Structure] 
EventToken
E v e n t T o k e n
F i e l d T o k e n
L a b e l
M e t h o d T o k e n
O p C o d e
P a r a m e t e r T o k e n
P r o p e r t y T o k e n
S i g n a t u r e T o k e n
S t r i n g T o k e n
T y p e T o k e n