{
  "manageEntity": {
    "action": "Create",
    "entityId": "1547920561",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Nice\",\"entity_id\":1054460943,\"track_timestamp_s\":124}}",
    "nonce": "0x24adb6afeaf81feb1d6ed5a7b8911952c29546b6e1cf43f2428b4f63e55d0ed5",
    "signature": "0xfa37f9dd38e29041f0016721c7038ad1423d0cba21a1ce794ec7b369b64fb604746421ec877bb6a6fe5b3d8e9482bd4fbceea7ba40126df4a265b311a07d90631c",
    "signer": "0x7Fa5a67C00c48DCA54f12c80579B583FcD79a330",
    "userId": "527480232"
  }
}