{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc0b9358df71e28f5bcc18553c367c6dbe063e9a51aa8308d99c4b7a034c0a65e",
    "signature": "0x65494d8bd3b70d9c20b4aab1a29517e3968d7ae916e36dd00fe2c2baa9f7b6313139f92e7e75e2aebc82984f8abd8c03551f2c7ed9685ed1af427f593b2962351c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}