{
  "manageEntity": {
    "action": "Create",
    "entityId": "342912980",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"flipped!\",\"entity_id\":1000152061,\"track_timestamp_s\":5}}",
    "nonce": "0xb8acb10cd34d08194e0e0aeafad0d953a55981317ab6877427f71dfc883517cf",
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}