{
  "devices": [
    {
      "device_id": "STACK1",
      "protocol": "TT_BLACKBUTTON",
      "entity_type": "ThinkingThing",
      "timezone": "America/Santiago",
      "attributes": [
        {
          "name": "internalId",
          "type": "string"
        },
        {
          "name": "last_operation",
          "type": "string"
        },
        {
          "name": "op_action",
          "type": "string"
        },
        {
          "name": "op_extra",
          "type": "string"
        }
      ]
    }
  ]
}