Deserializing JSON map with "key" & "value" properties does not work with Jackson

Questions

1. To begin with, does the serialized JSON serialization below make sense?
2. If so, why am I not getting the Map back?
3. What can I do about it on the deserializing side?

JSON serialization of Map<String, String> property (excerpt):

{
  "attributes": {
    "entry": [
      {
        "key": "operating system",
        "value": "GNU/Linux"
      },
      {
        "key": "allergies",
        "value": "weed"
      }
    ]
  }
}

POJO for deserialization:

class Contact implements Comparable<Contact>, Serializable {
    @JsonProperty("attributes")
    private Map<String, String> attributes;
    ...
}

Causes this exception:

Thread-4889 An exception occurred during request network execution :Could not read JSON: Can not deserialize instance of java.lang.String out of START_ARRAY token
            at [Source: libcore.net.http.FixedLengthInputStream@43822760; line: 1, column: 17] (through reference chain: com.example.model.Contact["attributes"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_ARRAY token
            at [Source: libcore.net.http.FixedLengthInputStream@43822760; line: 1, column: 17] (through reference chain: com.example.model.Contact["attributes"])
    org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Can not deserialize instance of java.lang.String out of START_ARRAY token
            at [Source: libcore.net.http.FixedLengthInputStream@43822760; line: 1, column: 17] (through reference chain: com.example.model.Contact["attributes"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_ARRAY token
            at [Source: libcore.net.http.FixedLengthInputStream@43822760; line: 1, column: 17] (through reference chain: com.example.model.Contact["attributes"])
            at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readInternal(MappingJackson2HttpMessageConverter.java:126)
            at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:147)
            at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:76)
            at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:484)
            at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:439)
            at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:237)
            at com.example.providers.Query$1.loadDataFromNetwork(Query.java:99)
            at com.octo.android.robospice.request.CachedSpiceRequest.loadDataFromNetwork(CachedSpiceRequest.java:45)
            at com.octo.android.robospice.request.RequestRunner.processRequest(RequestRunner.java:130)
            at com.octo.android.robospice.request.RequestRunner$1.run(RequestRunner.java:197)
            at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:390)
            at java.util.concurrent.FutureTask.run(FutureTask.java:234)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_ARRAY token
            at [Source: libcore.net.http.FixedLengthInputStream@43822760; line: 1, column: 17] (through reference chain: com.example.model.Contact["attributes"])
            at com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:691)
            at com.fasterxml.jackson.databind.deser.std.StringDeserializer.deserialize(StringDeserializer.java:46)
            at com.fasterxml.jackson.databind.deser.std.StringDeserializer.deserialize(StringDeserializer.java:11)
            at com.fasterxml.jackson.databind.deser.std.MapDeserializer._readAndBindStringMap(MapDeserializer.java:430)
            at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:312)
            at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:26)
            at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:525)
            at com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:106)
            at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:242)
            at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:118)
            at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:227)
            at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.des

The attributes Object when inspected in debugger after deserialization:

Further inspection after changing to:

@JsonProperty("attributes")
private Map<String, List<Map<String, String>>> attributes;

Dependencies:

• com.fasterxml.jackson.core:jackson-core:2.3.0
• com.fasterxml.jackson.core:jackson-databind:2.3.0
• com.fasterxml.jackson.core:jackson-annotations:2.3.0