shell> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/index?collection=products <<EOF
{ 
  "type" : "hash", 
  "unique" : false, 
  "fields" : [ 
    "a", 
    "b" 
  ] 
}
EOF

HTTP/1.1 201 Created
content-type: application/json; charset=utf-8

{ 
  "id" : "products/824832907", 
  "type" : "hash", 
  "fields" : [ 
    "a", 
    "b" 
  ], 
  "selectivityEstimate" : 1, 
  "unique" : false, 
  "sparse" : false, 
  "isNewlyCreated" : true, 
  "error" : false, 
  "code" : 201 
}