{
  "manageEntity": {
    "action": "Create",
    "entityId": "1741631198",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"oooooh!!\",\"entity_id\":809644952,\"track_timestamp_s\":41}}",
    "nonce": "0x692961dff2946ed3a604688f53af0cd0d0fc0ce8a3f735b700d9c1acfaa69e06",
    "signature": "0x534480c9d1dd2b368cac65a198a36558813630509b0edac46c90d66cf463c8e03d94fd00b6355cad80854f84dc6c66190a05baff08bf94413ae029de80396bff1b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}