Update a group

{
	"group": {
		"title": "My Groups Title"
	}
}

{
    "group": {
        "title": "My Groups Title",
        "p_admin": 1,
        "links": {
            "userGroups": "https://:account.api-us1.com/api/:version/groups/7/userGroups",
            "groupLimit": "https://:account.api-us1.com/api/:version/groups/7/groupLimit",
            "dealGroupGroups": "https://:account.api-us1.com/api/:version/groups/7/dealGroupGroups",
            "listGroups": "https://:account.api-us1.com/api/:version/groups/7/listGroups",
            "addressGroups": "https://:account.api-us1.com/api/:version/groups/7/addressGroups",
            "automationGroups": "https://:account.api-us1.com/api/:version/groups/7/automationGroups"
        },
        "id": "7"
    }
}