{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x755059c30b34a5266211036aeeb24d6b03b1d5ec79416326c025fc503a3df4e9",
    "signature": "0x8883ef98f866afb0786f8cdc9150ba3953988437ff8f6c38ad6c601cd430bfbf566a9cef4bd825a6ea5661c72cc45c4b1079820e13a1041943477c98bf64275c1c",
    "signer": "0x81F2748dFdc91A6A2a5dF18A832a53CfaCdd8EcA",
    "userId": "324287444"
  }
}