{
  "manageEntity": {
    "action": "Create",
    "entityId": "2078009816",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"nice\",\"entity_id\":664017428,\"track_timestamp_s\":52}}",
    "nonce": "0xc934dc84ed632baa80db0bd7bb9516a83aaf9bfe8fdf0cc9aea38195c7481b7e",
    "signature": "0x9c193bf5cc98f561bef62207a54226a3e74e4d589f891de2c4084ecb2f2a62cc12fafbfd99c2c55425acd5a735f3f19e9a95ea64a4c96d0857b5ca2010cc96401b",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "105826"
  }
}