curl --request PUT \
  --url https://sandbox.brimble.io/sandboxes/{id}/egress \
  --header 'Content-Type: application/json' \
  --header 'x-brimble-key: <api-key>' \
  --data '{
  "mode": "open"
}'

{
  "message": "Sandbox egress updated",
  "data": {
    "id": "507f1f77bcf86cd799439011",
    "egress": {
      "mode": "restricted",
      "allow": [
        "1.1.1.1"
      ]
    },
    "block_outbound": false,
    "network_updated": true
  }
}