diff --git a/lib/commands.py b/lib/commands.py
index f07aa7c02..7f6eda55d 100644
--- a/lib/commands.py
+++ b/lib/commands.py
@@ -665,13 +665,15 @@ command_options = {
 
 
 # don't use floats because of rounding errors
+json_loads = lambda x: json.loads(x, parse_float=lambda x: str(Decimal(x)))
 arg_types = {
-    'num':int,
-    'nbits':int,
-    'entropy':long,
-    'pubkeys': json.loads,
-    'inputs': json.loads,
-    'outputs': json.loads,
+    'num': int,
+    'nbits': int,
+    'entropy': long,
+    'tx': json_loads,
+    'pubkeys': json_loads,
+    'inputs': json_loads,
+    'outputs': json_loads,
     'tx_fee': lambda x: str(Decimal(x)) if x is not None else None,
     'amount': lambda x: str(Decimal(x)) if x!='!' else '!',
 }
diff --git a/lib/transaction.py b/lib/transaction.py
index d8bd0aeab..b5d903bc4 100644
--- a/lib/transaction.py
+++ b/lib/transaction.py
@@ -761,7 +761,6 @@ class Transaction:
         return out
 
     def sign(self, keypairs):
-        print "sign"
         for i, txin in enumerate(self.inputs):
             num = txin['num_sig']
             for x_pubkey in txin['x_pubkeys']: