Convert string to hash in json format

Ruby
1

In my controller I have an instance variable and I am returning that
instance variable to json.erb file.

logger.info "The details of @employee is..#{@employee.body.inspect}"

    The details of @employee is.."{\"date\"=>\"01-04-2012\",

“name”=>“David”, “empid”=>“E009”, “position”=>“10”,
“place”=>“noida”}

    logger.info "The class of employee

is…#{@employee.body.class.inspect}"

    The class of employee is...String

And I am returning it in json.erb file as

    respond_with(@employee)

But in the json.erb file when I try to output it as

{
    "details" : "<%[email protected]%>"
}

I am getting it as

 {
       "details": "{"date"=>"01-04-2012", "name"=>"David",

“empid”=>“E009”, “position”=>“10”, “place”=>“noida”}"
}

The output format I want it is in json format like below

{
           "details": "{
                        "date" : "01-04-2012",
                        "name" : "David",
                        "empid" : "E009",
                        "position" : "10",
                        "place" : "noida"
                        }"
}

I tried several combinations and I am able to do it with eval. But it
seems to be some security issues using that. I am not good at regex
also.Please help