curl -b cookies -c cookies -X POST -d @creative_search.json 'http://api.appnexus.com/creative-search'

creative_search.json

{
  "creative_search" : {
    "creative_ids" : [
      5608347, 
      5608348, 
      5608349, 
      5608350, 
      5608351, 
      5608352, 
      5608353, 
      5608390, 
      5608391, 
      5608392, 
      5608354, 
      5608355, 
      5608393, 
      5608394, 
      5608395, 
      5608396, 
      5608397, 
      5608398, 
      5608356, 
      5608357, 
      5608358, 
      5608359, 
      5608360, 
      5608361, 
      5608362, 
      5608363, 
      5608364, 
      5608365, 
      5608366, 
      5608367, 
      5608368, 
      5608369, 
      5608370, 
      5608371, 
      5608372, 
      5608373, 
      5608374, 
      5608375, 
      5608376, 
      5608377, 
      5608378, 
      5608379, 
      5608380, 
      5608381, 
      5608382, 
      5608383, 
      5608384, 
      5608385, 
      5608386, 
      5608387, 
      5608388, 
      5608389
    ], 
    "member_ids" : [1584]
  }
}