{
  "manageEntity": {
    "action": "Create",
    "entityId": "339598981",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"FIREE\",\"entity_id\":1947749472,\"track_timestamp_s\":74}}",
    "nonce": "0x507eecde82bf37b9920b20b7822d5e3502a1c205379db1411903e831f840aa51",
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    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
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}