{
  "manageEntity": {
    "action": "Create",
    "entityId": "1480809756",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":1689537966,\"body\":\"nice one!\",\"track_timestamp_s\":113}}",
    "nonce": "0xe92a3660363b745b4f9662ad8815dae8b8e62eb74aeb1c27cae76ad3f282ae5e",
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    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}