I use PurchaseRequisitionLineAuthorizationsHandling  and action AuthorizeRequisitionLines

Thats my json 

{"FullSelection":"LINE_NO=1^RELEASE_NO=1^REQUISITION_NO=1234^SEQUENCE_NO=1^",

"ChkptUsername": "username",

"ChkptPassword": "password",

"ChkptComment": "comment"

} 

What is wrong ? I receive message:

"ORA-40441: JSON syntax error"