{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa18f93d661bc6d061ca43620a86b387117aebbb171bfeb1c6acd7638ec6a774d",
    "signature": "0xad4a685d369caea6f58c532939de84727ffa9ffaeedb835e0b82667098d562b26258202e465c8bc0255e3392d0d27d5fef8bdecc941c0251f444b5e4d8f4e4581c",
    "signer": "0xfd33c3C0a3a0b115CAc2419a0B0c71F89a7d29aF",
    "userId": "390123561"
  }
}