public static String toArtifactDataJson(Map<?,?> properties) {
    return String.format("{ \"%s\": %s }", ARTIFACT_DATA_PROPERTY, jsonSerializer.toJson(properties));
  }
Determine if the request was for an instance resource.

@param requestProps  request properties

@return true if the request was for a specific instance, false otherwise
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/ArtifactResourceProvider.java