{
  "manageEntity": {
    "action": "Create",
    "entityId": "1428935500",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":1521436194,\"body\":\"vibes\",\"track_timestamp_s\":45}}",
    "nonce": "0x303c638e4c8a47d71a0e2b90e9f9341595505bb216d5a933744b934425bd8b57",
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    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}