curl
  -F 'name=My First Campaign'
  -F 'objective=<OBJECTIVE>'
  -F 'status=PAUSED'
  -F 'access_token=<ACCESS_TOKEN>'
  https://graph.facebook.com/v2.11/act_<AD_ACCOUNT_ID>/campaigns

{"id":"120330000012723217"}

curl -G
      -d 'fields=id,name,objective'
      -d 'access_token=<ACCESS_TOKEN>'
      https://graph.facebook.com/v2.11/120330000012723217