{
  "manageEntity": {
    "action": "Create",
    "entityId": "594170486",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":1190183174,\"body\":\"nice!\",\"track_timestamp_s\":37}}",
    "nonce": "0xa8578a798d735cd967b805617e5f0c30518b735c598aaab7daeba010f65ba195",
    "signature": "0xaba7b229cd468932925df5554a312a661c92184b7f858d917d3cee3bba7c782c62656dd77ca7b823fac8ae904899cd3f0f959eba845ea636c54614877fab03651b",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}