{
    "link_batch_1" : { "links" : { "link1" : ["leaf4", "spine101"] },
                       "links_before" : 48,
                       "links_after" : 44 },
    "link_batch_2" : { "links" : { "link1" : ["leaf4", "spine102"] },
                       "links_before" : 48,
                       "links_after" : 44 }
}