Cygnus subscription bad request - flume

Question

I have already configured a subscription in orion to cygnus when an entity is updated in the context broker. The orion agent has a logger sink by default. This is the subscribeContext:
$ (curl localhost:1026/v1/subscribeContext -s -S --header 'Content-Type: application/json' --header 'Accept: application/json' -d #- | python -mjson.tool) <<EOF
{
"entities": [
{
"type": "Room",
"isPattern": "false",
"id": "Room1"
}
],
"attributes": [
"pressure",
"temperature"
],
"reference": "http://172.17.0.3:5050/notify",
"duration": "P1M",
"notifyConditions": [
{
"type": "ONCHANGE",
"condValues": [
"pressure"
]
}
],
"throttling": "PT1S"
}
EOF
When I update the entity Room1, an event is sent to Cygnus but I have a bad request because of a Json invalid syntax:
org.apache.flume.source.http.HTTPBadRequestException: Request has invalid JSON Syntax.
at org.apache.flume.source.http.JSONHandler.getEvents(JSONHandler.java:119)
at org.apache.flume.source.http.HTTPSource$FlumeHTTPServlet.doPost(HTTPSource.java:184)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:814)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2
at com.google.gson.Gson.fromJson(Gson.java:806)
at com.google.gson.Gson.fromJson(Gson.java:761)
at org.apache.flume.source.http.JSONHandler.getEvents(JSONHandler.java:117)
... 16 more
Caused by: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2
at com.google.gson.stream.JsonReader.expect(JsonReader.java:339)
Any ideas of what is happening??
Thanks in advance.