{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1e2f19f35c51a58f7b6ca8d06712ecce628a295b74be42f1f97fdcc24a291195",
    "signature": "0x640faffbf3eb16eabc25fcdad0561c3ca6b9516abb31e5d851f9e7f84f8800da61bd6c465ab008246650cffeeb8a2f53b27a943a31b65eecfdcadfbb06a4e2221b",
    "signer": "0x28Ddc4C1Ba5279c4e22117Fd057a1b2C620AF75C",
    "userId": "854778562"
  }
}