I searched all over but not found the right one.

My Body string below,


My Class here

global static void processPermSetDelegation() {  

    List<permissionDataWrapper>  delegationMap = (List<permissionDataWrapper>)JSON.deserialize(RestContext.request.requestBody.toString(),permissionDataWrapper.class); 
    for(permissionDataWrapper cp : delegationMap) {
        for(string s: cp.assignPermSetNames )
            System.debug('Assign :------'+s);
        for(string a: cp.revokePermSetNames)
            System.debug('Revoke :------'+a);


global class permissionDataWrapper {
    public String EmployeeNumber {get;set;}
    public Set<String> assignPermSetNames {get;set;}
    public Set<String> revokePermSetNames {get;set;}
    permissionDataWrapper () {
        assignPermSetNames = new Set<string>();
        revokePermSetNames = new Set<string>();

Error :

Malformed JSON: Expected '{' at the beginning of object

  • 1
    This line is causing the issue: {"revokePermSetNames":"RemovPerm3","RemovPerm4"], Jun 14, 2017 at 11:25
  • In this line, you forgot to add the starting square bracket [ to start array. Jun 14, 2017 at 11:26
  • Yeah that's the only error I encountered as well, though with a different message.
    – Adrian Larson
    Jun 14, 2017 at 11:27
  • How are you passing the body? Jun 14, 2017 at 11:27
  • I have pasted wrong body. I will edit now.
    – bharath
    Jun 14, 2017 at 11:28

1 Answer 1


Try this ;)

List<permissionDataWrapper>  delegationMap = (List<permissionDataWrapper>)JSON.deserialize(RestContext.request.requestBody.toString(), List<permissionDataWrapper>.class);

You need to pass the List<permissionDataWrapper>.class not permissionDataWrapper.class for the 2nd parameter(JSON.deserialize(1st, 2nd)) because you are processing a list not a single item.


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