{
  "manageEntity": {
    "action": "Create",
    "entityId": "554903473",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"booomba\",\"entity_id\":1985672676,\"track_timestamp_s\":6}}",
    "nonce": "0x7ba4f1adc3f5bd69d7d11f726f176a5844d61c4a1715ec469b650a95a5415cec",
    "signature": "0xdb5f1563c5c300283f8cba5af4b86384a12b11a5fd8d05d0963df18721f7831414d205363ecdd51cea0ede988f79771c3f4719461bceb4869b9abcd42c2624751c",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "105826"
  }
}