diff --git a/src/Model/Types/Workflow.hs b/src/Model/Types/Workflow.hs
index d36d666c1..7f87c6723 100644
--- a/src/Model/Types/Workflow.hs
+++ b/src/Model/Types/Workflow.hs
@@ -122,7 +122,7 @@ data WorkflowGraphEdge userid fileid = WGE
   }
 
 instance (Show userid, Show fileid) => Show (WorkflowGraphEdge userid fileid) where
-  show WGE{..} = "(wgeActors:" ++ show wgeActors ++ "; wgeTarget:" ++ show wgeTarget ++ "; wgeForm:" ++ show wgeForm ++ ")"
+  show WGE{..} = "WGE {wgeActors = " ++ show wgeActors ++ ", wgeTarget = " ++ show wgeTarget ++ ", wgeForm = " ++ show wgeForm ++ "}"
 
 instance (Eq userid, Eq fileid) => Eq (WorkflowGraphEdge userid fileid) where
   e1@WGE{} == e2@WGE{} = wgeActors e1 == wgeActors e2 && wgeTarget e1 == wgeTarget e2 && wgeForm e1 == wgeForm e2
@@ -151,21 +151,21 @@ data WorkflowInstanceScope' = WISGlobal' | WISTerm' | WISSchool' | WISCourse'
 
 instance (ToJSON userid) => ToJSON (WorkflowRole userid) where
   toJSON (WorkflowRoleUser uid) = JSON.object
-    [ "role" JSON..= ("user" :: Text)
+    [ "tag"  JSON..= ("user" :: Text)
     , "user" JSON..= uid
     ]
   toJSON (WorkflowRoleAuthorized authDNF) = JSON.object
-    [ "role"       JSON..= ("authorized" :: Text)
+    [ "tag"        JSON..= ("authorized" :: Text)
     , "authorized" JSON..= authDNF
     ]
   toJSON (WorkflowRoleInitiator uid) = JSON.object
-    [ "role"       JSON..= ("initiator" :: Text)
+    [ "tag"        JSON..= ("initiator" :: Text)
     , "initiator"  JSON..= uid
     ]
 instance (FromJSON userid) => FromJSON (WorkflowRole userid) where
   parseJSON = JSON.withObject "WorkflowRole" $ \o -> do
-    role <- (o JSON..: "role" :: Parser Text)
-    case role of
+    fieldTag <- (o JSON..: "tag" :: Parser Text)
+    case fieldTag of
       "user" -> do
         uid <- o JSON..: "user"
         return $ WorkflowRoleUser uid
@@ -175,7 +175,7 @@ instance (FromJSON userid) => FromJSON (WorkflowRole userid) where
       "initiator" -> do
         iid <- o JSON..: "initiator"
         return $ WorkflowRoleInitiator iid
-      _ -> terror $ "WorkflowRole parseJSON error: expected role (user|authorized|initiator), but got " <> role
+      _ -> terror $ "WorkflowRole parseJSON error: expected role (user|authorized|initiator), but got " <> fieldTag
 
 instance (ToJSON userid, ToJSON fileid) => ToJSON (WorkflowGraph userid fileid) where
   toJSON WorkflowGraph{..} = JSON.object
@@ -292,4 +292,4 @@ deriveJSON defaultOptions
 
 
 testGraph :: WorkflowGraph Text Text
-testGraph = WorkflowGraph $ Map.fromList [("node1", (WGN (WGNS "id" True (Just "someLabel")), Set.fromList [WGE (Set.fromList [WorkflowRoleUser "user-id", WorkflowRoleInitiator "init-user-id"]) "node1" (Map.fromList [("sometext", impureNonNull $ Set.fromList [WorkflowEdgePayloadSpecification $ WorkflowEdgePayloadFieldText "text-label" "text-placeholder" (Just "text-tooltip") (Just "text-default")]),("someuser", impureNonNull $ Set.fromList [WorkflowEdgePayloadSpecification $ WorkflowEdgePayloadFieldUser "user-label" Nothing Nothing]),("somebool", impureNonNull $ Set.fromList [WorkflowEdgePayloadSpecification $ WorkflowEdgePayloadFieldBool "bool-label" Nothing (Just True)])])]))]
+testGraph = WorkflowGraph $ Map.fromList [("node1", (WGN (WGNS "id" True (Just "someLabel")), Set.fromList [WGE (Set.fromList [WorkflowRoleUser "user-id", WorkflowRoleInitiator "init-user-id"]) "node1" (Map.fromList [("sometext", impureNonNull $ Set.fromList [WorkflowEdgePayloadSpecification $ WorkflowEdgePayloadFieldText "text-label" "text-placeholder" (Just "text-tooltip") (Just "text-default")]),("someuser", impureNonNull $ Set.fromList [WorkflowEdgePayloadSpecification $ WorkflowEdgePayloadFieldUser "user-label" Nothing Nothing]),("someboolandnumber", impureNonNull $ Set.fromList [WorkflowEdgePayloadSpecification $ WorkflowEdgePayloadFieldBool "bool-label" Nothing (Just True), WorkflowEdgePayloadSpecification $ WorkflowEdgePayloadFieldNumber "number-label" "number-placeholder" Nothing (Just singleRes) singleRes])])]))]
diff --git a/src/Utils.hs b/src/Utils.hs
index ac55bfc69..bcc500c63 100644
--- a/src/Utils.hs
+++ b/src/Utils.hs
@@ -10,6 +10,7 @@ import qualified Data.Foldable as Fold
 import Data.Foldable as Utils (foldlM, foldrM)
 import Data.Monoid (First, Sum(..))
 import Data.Proxy
+import Data.Scientific (base10Exponent)
 
 import Data.CaseInsensitive (CI)
 import qualified Data.CaseInsensitive as CI
@@ -350,18 +351,26 @@ rationalToFixed2 = rationalToFixed
 data SomeResolution = forall prec. HasResolution prec => SomeResolution (Proxy prec)
 
 instance Eq SomeResolution where
-  _ == _ = True
+  SomeResolution (_ :: Proxy p) == SomeResolution (_ :: Proxy p') = True
 instance Ord SomeResolution where
   compare _ _ = EQ
 
-instance FromJSON SomeResolution where
-  parseJSON = parseJSON
 instance ToJSON SomeResolution where
-  toJSON = toJSON
+  toJSON (SomeResolution (_ :: Proxy prec)) = undefined
+instance FromJSON SomeResolution where
+  parseJSON = Aeson.withScientific "SomeResolution" $ \s -> case base10Exponent s of
+    0 -> return $ SomeResolution (Proxy @E0)
+    1 -> return $ SomeResolution (Proxy @E1)
+    2 -> return $ SomeResolution (Proxy @E2)
+    3 -> return $ SomeResolution (Proxy @E3)
+    e -> terror $ "SomeResolution parseJSON error: expected exponent E(0|1|2|3), but got " <> tshow e
 
 someResolutions :: [SomeResolution]
 someResolutions = [ SomeResolution (Proxy @E0), SomeResolution (Proxy @E1), SomeResolution (Proxy @E2), SomeResolution (Proxy @E3) ]
 
+singleRes :: SomeResolution
+singleRes = SomeResolution (Proxy @E2)
+
 
 ----------
 -- Bool --