How to parse REST requests results ?

Hello,

I created a workflow to automatise the creation of a vm and his configuration under RedHat Satellite. In order to make the RedHat Satellite configuration, I need to run a REST request (with GET method) and then I have to parse the results but I don't find the way to do this.

The request.execute() method that I use have no function available to parse the results. The only method that I find "usefull" is contentAsString but it return a string.

Could you help me to solve this ?

Here is an example of the contentAsString results, I need to get the id result :

{
    "total": 61,
    "subtotal": 1,
    "page": 1,
    "per_page": 20,
    "search": "GP-PROD-CentOs-7.2",
    "sort":
    {
        "by": null,
        "order": null
    },
    "results":
    [
        {
            "subnet_id": null,
            "subnet_name": null,
            "operatingsystem_id": 23,
            "operatingsystem_name": "CentOS 7.2",
            "domain_id": 1,
            "domain_name": "si.francetv.fr",
            "environment_id": 35,
            "environment_name": "KT_Default_Organization_Library_VUE_CentOS_7_2_25",
            "compute_profile_id": 1,
            "compute_profile_name": "1-Profile_de_VM-Petite",
            "ancestry": null,
            "parent_id": null,
            "parent_name": null,
            "puppet_proxy_id": 1,
            "puppet_ca_proxy_id": 1,
            "ptable_id": 108,
            "ptable_name": "FTV Disk Layout CentOS",
            "medium_id": 19,
            "medium_name": "CentOs 7.2",
            "architecture_id": 1,
            "architecture_name": "x86_64",
            "realm_id": null,
            "realm_name": null,
            "created_at": "2016-05-02 15:18:44 UTC",
            "updated_at": "2016-10-19 13:51:43 UTC",
            "id": 56,
            "name": "GP-PROD-CentOs-7.2",
            "title": "GP-PROD-CentOs-7.2"
        }
    ]
}