public class EmailCondition implements Serializable
{
private static final long serialVersionUID = -5429392022485346125L;
private Filter.MailAttributes key;
private Filter.Operator op;
private String value;
}

public class MailFilterCondition implements Serializable {
private static final long serialVersionUID = -2691329267596354267L;
private int automationId;
private Map<String, EmailCondition > emailConditionMap;
private String filterString;
}

@PostMapping(value = "/email")
public void createAutomationFilter(@RequestParam(value="automation_id") int automationId, @RequestBody MailFilterCondition filterData) {

    System.out.println(filterData);
}

{
"automationId": 123,
"filterString": "(c1_and_c2)_or_(c1_and_c3)",
"emailConditionMap":
{
    "c1":{
        "key": "from",
        "op": "contains",
        "value": "jhon"
    },

    "c2":{
        "key": "from1",
        "op": "starts",
        "value": "ron"
    },

    "c3":{
        "key": "from",
        "op": "contains",
        "value": "payment"
    }
}
}

MailFilterCondition [automationId=123, emailConditions=null, filterString=(c1_and_c2)_or_(c1_and_c3)]