{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "335638261",
    "entityType": "User",
    "nonce": "0x35314858a45b144c73ae48fb9a6e8d696209d618c9bfdf8a74bc2708fc452a3d",
    "signature": "0x2c86e89584966a9b03cf726ce4286b327997d80dee0a913dd9382d53ec9f674d58cbc81048ef7b304f2f786ba5c78475cc9b3aa7a227ccfb300094e7d11047981c",
    "signer": "0x821EeEfD9b00D59b05756c9861bc5B48b649f4ED",
    "userId": "490473214"
  }
}