Form.vue

<template>
  <VueForm action="/api/test.json">
    <FormLabel label="First name">
      <FormInput name="firstName"/>
    </FormLabel>
    
    <FormLabel label="Last name">
      <FormInput name="lastName">
    </FormLabel>
    
    <FormSubmit>Save</FormSubmit>
  </VueForm>
</template>

request.json

{
  "firstName": "...",
  "lastName": "..."
}

TestAction.java

pubic class TestAction extends ApiAction<TestAction.Request, TestAction.Response> {
  public Resolution execute(Request request) {
    User user = new User();
    user.setFirstName(request.firstName);
    user.setLastName(request.lastName);
    
    // save user
    
    return respond(new Response(user.getId()));
  }
  
  public static class Request {
    @Validate(minlength = 3, required = true)
    public String firstName;
    @Validate(maxlength = 1024, required = true)
    public String lastName;
  }
  
  public static class Response {
    public long id;
    
    public Response(long id) {
      this.id = id;
    }
  }
}