Stuff signed data in a standalone object

Makes both generating it in sydent, and verifying it here, simpler at
the cost of some repetition

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/util/third_party_invites.py b/synapse/util/third_party_invites.py

index 792db5ba39..31d186740d 100644
--- a/synapse/util/third_party_invites.py
+++ b/synapse/util/third_party_invites.py
@@ -23,8 +23,8 @@ JOIN_KEYS = {
     "token",
     "public_key",
     "key_validity_url",
-    "signatures",
     "sender",
+    "signed",
 }