Perseo rule can't be created: Event type not found - fiware-orion

Question

I'm emulating a dummy scenario to play around with Perseo and Orion. I'm using 4 docker containers: Mongo, Orion, Perseo FE, and Perseo Core. All of them running healthy.
The steps that I'm doing are:
First, I create the entity with POST to Orion (localhost:1026/v2/entities). This entity looks like this:
{
"id": "DummyEvent1",
"type": "DummyEvent",
"identification": {
"value": "default",
"type": "String"
}
}
Second, I create a subscription with a POST to Orion (localhost:1026/v2/subscriptions) in order to push this DummyEvent from Orion to Perseo:
{
"description": "A subscription to get info about DummyEvent1",
"subject": {
"entities": [
{
"id": "DummyEvent1",
"type": "DummyEvent"
}
],
"condition": {
"attrs": [ ]
}
},
"notification": {
"http": {
"url": "http://perseo-fe:9090/notices"
},
"attrs": [
"identification"
]
}
}
Third, If I GET all the subscriptions in Orion (localhost:1026/v2/subscriptions), I can see that Orion is forwading the DummyEvent correctly to Perseo:
{
"id": "5ca5c18ab07f5ae96aa12152",
"description": "A subscription to get info about DummyEvent1",
"status": "active",
"subject": {
"entities": [
{
"id": "DummyEvent1",
"type": "DummyEvent"
}
],
"condition": {
"attrs": []
}
},
"notification": {
"timesSent": 1,
"lastNotification": "2019-04-04T08:34:18.00Z",
"attrs": [
"identification"
],
"attrsFormat": "normalized",
"http": {
"url": "http://perseo-fe:9090/notices"
},
"lastSuccess": "2019-04-04T08:34:18.00Z",
"lastSuccessCode": 200
}
}
Fourth, But the problem appears when I try to POST a rule in Perseo (localhost:8080/perseo-core/rules) using this DummyEvent:
{
"name": "dummy_rule",
"text": "select * from DummyEvent",
"action": {
"type": "update",
"parameters": {
"name": "identification",
"value": "updatedValue",
"type": "string"
}
}
}
Perseo tells me this:
{
"error": "Failed to resolve event type: Event type or class named 'DummyEvent' was not found [select * from DummyEvent]"
}
What am I doing wrong?
Thanks!