What app is responsible for these ephemeral events with “peerId” in content? Absurd amount of events like this for the last few months.

{'content': '{"peerId":"D8tp0LvNCiVVVxVLUidg","offer":{"type":"offer","sdp":"109,217,57,20,176,24,225,136,120,225,50,232,201,72,37,118$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"}}', 'created_at': 1747612813, 'id': '1ac795e5a057fee8fb4e6d3ecfc41e9fc207fdb98ea991ab9d2a4a8157b2bf18', 'kind': 22732, 'pubkey': '9cea2f788a3006bfef93b48c5a42211f706b9e005b88419ec7e765feb8da2926', 'sig': '0835a6f794a4be96df246594484a716dffb76022e90245d0736f3782ec71b6c1bfa208c4323b7787a3031c806f397ee880c396011d6a06c93f1d8cdcd9072dbb', 'tags': [['x', '5f3i1q5e4g6qb1p456h221c1s6d29k5o62j47']]}