In your example the | is the delimiter for the fields in the message.
Tiles.X & "|" & Tiles.Y & "|" & Tiles.Angle & "|" & Tiles.UID
Would be a json message for thesprites X and Y coordinate and the angle and the UID
Then when you receive the message you can get the data with this command:
int(tokenat(Photon.EventData,XXX,"|"))
the "int" means turning it into an integer, otherwise it is text. the XXX means where in the message the data is stored, 0 is always first. in this example above Photon.EventData,3,"|" would be the UID of the sprite you sent.