{
  "manageEntity": {
    "action": "Create",
    "entityId": "553830099",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":487952,\"body\":\"yoooo\",\"comment_id\":553830099,\"track_timestamp_s\":26,\"mentions\":[]}}",
    "nonce": "0x79d1e681ca6dad23dbea8c16586c753bb558ad61b0199a8ceef84fd78c26243b",
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    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}