{
  "manageEntity": {
    "action": "Create",
    "entityId": "1708187202",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":1343577610,\"body\":\"crazy good\",\"track_timestamp_s\":60}}",
    "nonce": "0x20cffe297412d46f95f710f54f69c4993ff5f8e598cdac0ed9ec6a7db41a303e",
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    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "20"
  }
}