{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x73deecb4ff35d2b43bf5be48f72587306eb757137393873890d13174f0c186fd",
    "signature": "0x6750476959d7172241ee7e0652a1c194872fbc259b8e751f4a8db2353424f332158176cccfdbea64afbe4599890c9b6b7d4e07bf7e015ae42efb8eae7511a8d81c",
    "signer": "0x993789623D8C7E3AB4fD37b63914B6409C6F755A",
    "userId": "654588526"
  }
}