diff --git a/jsonld-contexts/cud-eco-gagnant.jsonld b/jsonld-contexts/cud-eco-gagnant.jsonld
index d7100b7..b05495c 100644
--- a/jsonld-contexts/cud-eco-gagnant.jsonld
+++ b/jsonld-contexts/cud-eco-gagnant.jsonld
@@ -6,6 +6,7 @@
     "https://easy-global-market.github.io/cud-data-models/jsonld-contexts/user.jsonld",
     "https://easy-global-market.github.io/cud-data-models/jsonld-contexts/fluid.jsonld",
     "https://easy-global-market.github.io/cud-data-models/jsonld-contexts/consent.jsonld",
-    "https://uri.etsi.org/ngsi-ld/v1/ngsi-ld-core-context-v1.7.jsonld"
+    "https://easy-global-market.github.io/ngsild-api-data-models/alertEventRisk/jsonld-contexts/alertEventRisk.jsonld",
+    "https://uri.etsi.org/ngsi-ld/v1/ngsi-ld-core-context-v1.8.jsonld"
   ]
 }
diff --git a/ngsild-payloads/alert.jsonld b/ngsild-payloads/alert.jsonld
new file mode 100644
index 0000000..6b80c7f
--- /dev/null
+++ b/ngsild-payloads/alert.jsonld
@@ -0,0 +1,32 @@
+{
+  "id": "urn:ngsi-ld:Alert:7a08a58e-e613-4cc0-9160-8a2636970721",
+  "type": "Alert",
+  "hasSubject": {
+    "type": "Relationship",
+    "object": "urn:ngsi-ld:Event:7a08a58e-e613-4cc0-9160-8a2636970721"
+  },
+  "mailingList": {
+    "type": "Property",
+    "value": {
+      "email": [
+        "user@email.com"
+      ]
+    }
+  },
+  "message": {
+    "type": "JsonProperty",
+    "json": {
+      "body": "[body of the mail]",
+      "subject": "[ALERT] Electricity consumption exceeded set value"
+    }
+  },
+  "occurrence": {
+    "type": "Property",
+    "value": true,
+    "observedAt": "2024-04-18T16:40:00Z"
+  },
+  "triggeredBy": {
+    "type": "Property",
+    "value": "urn:ngsi-ld:Subscription:7a08a58e-e613-4cc0-9160-8a2636970721"
+  }
+}
\ No newline at end of file
diff --git a/ngsild-payloads/event.jsonld b/ngsild-payloads/event.jsonld
new file mode 100644
index 0000000..195116c
--- /dev/null
+++ b/ngsild-payloads/event.jsonld
@@ -0,0 +1,41 @@
+{
+  "id": "urn:ngsi-ld:Event:7a08a58e-e613-4cc0-9160-8a2636970721",
+  "type": [
+    "Event",
+    "AggregatedThresholdBreach"
+  ],
+  "hasSubject": {
+    "type": "Relationship",
+    "watchedProperties": {
+      "type": "Property",
+      "value": "consumption"
+    },
+    "object": "urn:ngsi-ld:FluidMonitoring:Electricity:7a08a58e-e613-4cc0-9160-8a2636970721"
+  },
+  "occurrence": {
+    "type": "Property",
+    "value": "510",
+    "observedAt": "2024-04-18T16:39:00Z"
+  },
+  "status": {
+    "type": "Property",
+    "value": "true",
+    "observedAt": "2024-04-18T16:39:00Z"
+  },
+  "thresholdType": {
+    "type": "Property",
+    "value": "Upper"
+  },
+  "thresholdValue": {
+    "type": "Property",
+    "value": "500"
+  },
+  "thresholdAggrPeriod": {
+    "type": "Property",
+    "value": "P7D"
+  },
+  "hasAlert": {
+    "type": "Relationship",
+    "object": "urn:ngsi-ld:Alert:7a08a58e-e613-4cc0-9160-8a2636970721"
+  }
+}
\ No newline at end of file
diff --git a/ngsild-payloads/subscription.jsonld b/ngsild-payloads/subscription.jsonld
new file mode 100644
index 0000000..0871d37
--- /dev/null
+++ b/ngsild-payloads/subscription.jsonld
@@ -0,0 +1,20 @@
+{
+  "id": "urn:ngsi-ld:Subscription:7a08a58e-e613-4cc0-9160-8a2636970721",
+  "type": "Subscription",
+  "entities": [
+    {
+      "id": "urn:ngsi-ld:Event:7a08a58e-e613-4cc0-9160-8a2636970721",
+      "type": "AggregatedThresholdBreach"
+    }
+  ],
+  "watchedAttributes": [
+    "occurrence"
+  ],
+  "notification": {
+    "format": "normalized",
+    "endpoint": {
+      "uri": "http://localhost:8080",
+      "accept": "application/json"
+    }
+  }
+}
\ No newline at end of file