{
  "manageEntity": {
    "action": "Create",
    "entityId": "1724479529",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":69457320,\"body\":\"cool!\",\"track_timestamp_s\":47}}",
    "nonce": "0x9c63c0a424279f2e962e695b0c46fb0fa6a705433927fd0575de3f77a3e76f8b",
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    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}