{
  "manageEntity": {
    "action": "Create",
    "entityId": "569255627",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"\u003c3 \u003c3!!\",\"entity_id\":1416603629,\"track_timestamp_s\":53}}",
    "nonce": "0x428ef544cb3d42535f1b0c8b828e6f960ce252d66304a0c14371e92c700eb8b2",
    "signature": "0x29df217a2360bab6bcfe03eee79afdf1c968dd0bbf695351a5695851e67320d8395ae51976bff15de05c5a060a86df7e3d3daae199a9bbcff7ecc8828847140b1c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}