{
  "manageEntity": {
    "action": "Create",
    "entityId": "671640499",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Nice\",\"entity_id\":1928330128,\"track_timestamp_s\":29}}",
    "nonce": "0xd7d337f3e578e6b243dbfe4d0894f0d570f13419359a27824be9f429cf3c4d1e",
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    "signer": "0x7Fa5a67C00c48DCA54f12c80579B583FcD79a330",
    "userId": "527480232"
  }
}