{
  "manageEntity": {
    "action": "Create",
    "entityId": "545306209",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":606203903,\"body\":\"super fresh!\",\"track_timestamp_s\":130}}",
    "nonce": "0x0c2269b91462d983e1f9c2d605c61233ed53b125e2e887164d4d1b8cfa639b66",
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    "userId": "52309"
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}