{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x51c4877af93b498229a872d11e70830a0dceff76c5ed6e9384c3633f4109c93c",
    "signature": "0x5509825a4d5a4f6d603a0190e6a215a5487a77fa6652ba7cdaee2b923889c3d82f7cb955bd55218a439b327731201ebcb2f7251722fe2ffa31a8811cf16723091c",
    "signer": "0x3cF3403629aAD571dED750e5ea8E70E158261d07",
    "userId": "557617785"
  }
}