“FlowableException: Could not deserialize event to json”

Hi ,
I created simple process to receive messages from rabbitMq but once i published a message from rabbitMq then I am getting an error in flowable like Could not deserialize event to JSON . and also this message Unrecognized token ‘SGk’: was expecting (JSON String, Number, Array, Object or token ‘null’, ‘true’ or ‘false’).

Could you please help me that how can i receive event from rabbitMQ .

Thanks
Abhishek