{
  "manageEntity": {
    "action": "Create",
    "entityId": "609963619",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Genial\",\"entity_id\":551507307,\"track_timestamp_s\":15}}",
    "nonce": "0x5080894df9f4c9a3b936d28174b4c6d40d8efcec395330942bb9c1834f14d6af",
    "signature": "0x3079a18910db9971d74ac6e317a2d4bc8c04e497511761f4b85d1c0c8f359bfb4e2a399f0c73b3e97945d8e1fde75365d0feb9120ae16bcf65eed5bda2eb0fa41c",
    "signer": "0x13f8ca0832087662A9bA298e1F708853B8615826",
    "userId": "990836999"
  }
}