Spring @RequestBody: the request sent by the client was syntactically incorrect

Hi everyone this is my first question here, hope you can help me with this issue I'm having right now. I want to send a JSON Object using JQuery to a Spring Controller. The format of the JSON Object is as follows: ``` {"ssoArray":["21212", "231341"], "groupArray":["g10002", "g10003"]} ``` But I got the error message: the request sent by the client was syntactically incorrect My Environment: - Spring 3.0.6 - jackson 1.9.13 - JBoss 4.2 JQuery code: Update: Added the full code of the javascript method that makes the ajax call ``` function addRemoveAdmin(action, ssoArray, groupArray) { var uri = actionPath + "/"; var jsonParameter = {"ssoArray":ssoArray, "groupArray":groupArray}; if(action == "add") { uri = uri + addAdminAction; } else { uri = uri + removeAdminAction; } console.log(typeof jsonParameter); $.ajax({ url:uri, type:"POST", data:jsonParameter, contentType:"application/json; charset=utf-8", dataType:"json", success: function(){ alert(data); } }); } ``` Controller code: ``` @RequestMapping(value = "/addAdmin", method = RequestMethod.POST) public String addAdmin(@RequestBody final AdminAndGroup personsAndGroups) throws Exception { LOGGER.info("[RequestController] - addAdmin start"); LOGGER.info(personsAndGroups.toString()); return "OK"; } ``` Mapping class: ``` public class AdminAndGroup implements Serializable { private static final long serialVersionUID = 9024455757311860269L; private List<String> ssoArray; private List<String> groupArray; public AdminAndGroup(){} public List<String> getSsoArray() { return ssoArray; } public void setSsoArray(List<String> ssoArray) { this.ssoArray = ssoArray; } public List<String> getGroupArray() { return groupArray; } public void setGroupArray(List<String> groupArray) { this.groupArray = groupArray; } @Override public String toString() { return "AdminAndGroup [ssoArray=" + ssoArray + ", groupArray=" + groupArray + "]"; } ``` } I have used java.util.List to map the arrays that come inside the JSON Object but I'm not sure if this is the right way to tackle the issue. Also I have searched in Stack Overflow and I haven't found an example on how to map arrays inside a JSON Object. Thanks in advance.