Convert the JSON to an ABAP structure

Hi All,

I'm trying to convert a JSON String into ABAP structure using  'deserialize' method of class 'cl_trex_json_deserializer'

Here is the JSON String which I want to convert into ABAP structure

json_response = {"token":"sometokenstring","token_type":"sometokentypestring","key":"somekeystring"}

and below is the code

types: begin of ty_stru,

           token type string,

           token_type type string,

           key     type string,

          end of ty_stru.

         data: out  TYPE ty_stru,

                  lr_json_deserializer TYPE REF TO cl_trex_json_deserializer.

CREATE OBJECT lr_json_deserializer.

lr_json_deserializer->deserialize( EXPORTING json = json_response IMPORTING abap = out).

when I run this code I'm getting CX_TREX_SERIALIZATION exception

Could you help me fix this

Thank you

Nagaraju