Error message while posting user signup

Following error showing while using POST for user/signup
error code
`{
    "error": {
        "message": "Cannot read property 'email' of undefined"
    }
}`

POST code:
`	{
		"email":"test",
		"password": "password"
        }
`
or
`	{
                "email":"test@test.com",
		"password": "password"
        }
`

