JED 1.6.0+ - Respawnable Nether

{
    "dimensions": [
        {
            "dim": -1,
            "override": true,
            "dimensiontype": {
                "id": -1,
                "name": "Nether (JED)",
                "suffix": "_dim-1",
                "keeploaded": false,
                "worldprovider": "WorldProviderHellJED"
            },
            "jed": {
                "CanRespawnHere": true,
                "CanSleepHere": "allow"
            }
        }
    ]
}