{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1222a33a0e63aabd05e1ad038dc41497293b3209e754c91b5328e469ec26ed67",
    "signature": "0x3908304354f4f41ee3349c9e18c8dee391c98cd01b7ddc43e925ee1fa745551b7e3b7f21325f82f48aa417ded02bff9223fc652455190bd3eeeed46c1266fb231c",
    "signer": "0xd4D22613a6406cccF0EE962b9d13Efa6A9795F2A",
    "userId": "384241009"
  }
}