Integromat using an email address as the item ID

I am attempting to change a status using Integromat and I have elected an email address as the unique identifier but it isn’t working. This is the error I get:

The operation failed with an error. [200] [{“message”:“Parse error on “@” (DIR_SIGN) at [1, 82]”,“locations”:[{“line”:1,“column”:82}]}]

Everything else is working fine. If anyone has ran into this error and have a solution it would be much appreciated