{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4220",
    "entityType": "User",
    "nonce": "0xca37fb7ab81473cdbad9161944706b829cfe3eb73fd455349e37961c8e1d7e75",
    "signature": "0xf9cf1f1f2cadbe2a3f557d82955a45ffe80902c4d2b7dbb95811c8be472919e31e6885b38628a5b4646eb1c1818cb367caf2868cc0e05f4110452fdb25ea27df1b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}