I am using DSpace Rest Api...Now using this i want to create collection . There is url that specifies how to create i.e. http://localhost:8080/dspace/collections/new.form
now there are some required field need to be set..After setting that field when i m clicking on save button it give me following error..

  "ref0": {
    "entityURL": "\/dspace\/collections\/new",
    "reference": "\/dspace\/collections\/new",
    "status": 500,
    "error": "Failure attempting to process reference (\/dspace\/collections\/new) for url (\/dspace\/collections\/new): Bad request:org.sakaiproject.entitybus.exception.EntityException: Bad request"
Any idea about the error?