{
    "variants": {
        "": [ { "model": "block/packed_mud", "weight":540 }
,{ "model": "block/packed_mud1", "weight":6 }
,{ "model": "block/packed_mud2", "weight":6 }
,{ "model": "block/packed_mud3", "weight":6 }
,{ "model": "block/packed_mud4", "weight":72 }

 ]   }
}
