{
  "manageEntity": {
    "action": "Create",
    "entityId": "1322154323",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":1873037983,\"body\":\"fireeee!\",\"comment_id\":1322154323,\"track_timestamp_s\":48,\"mentions\":[]}}",
    "nonce": "0xee805230d2a9e7d6e7042c1285af22705c8a60f88ad8a8de677b55bce13928d1",
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    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}