curl --request POST \
  --url https://api.box.com/2.0/shield_information_barriers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "enterprise": {
    "id": "1910967",
    "type": "enterprise"
  }
}
'

{
  "id": "11446498",
  "type": "shield_information_barrier",
  "enterprise": {
    "id": "1910967",
    "type": "enterprise"
  },
  "status": "draft",
  "created_at": "2020-06-26T18:44:45.869Z",
  "created_by": {
    "id": "11446498",
    "type": "user"
  },
  "updated_at": "2020-07-26T18:44:45.869Z",
  "updated_by": {
    "id": "11446498",
    "type": "user"
  },
  "enabled_at": "2020-07-26T18:44:45.869Z",
  "enabled_by": {
    "id": "11446498",
    "type": "user"
  }
}