[
 {
  "op": "add",
  "path": "/properties/CustomSecurityGroupIds/format",
  "value": "AWS::EC2::SecurityGroup.Ids"
 },
 {
  "op": "add",
  "path": "/properties/CustomSecurityGroupIds/items/format",
  "value": "AWS::EC2::SecurityGroup.Id"
 }
]
