{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "542683",
    "entityType": "User",
    "nonce": "0x54fefb27e806ec549e510c6c8d79ff88d16f210c12f6c76eee6ab04121ac6cc7",
    "signature": "0x85273f7b06e1303ccc63b9a873942aa18e70d4ec16a80f2828f55ee01db5602969b8e6468362e06cb3b7480d4b2545764c70d19dcf0640bedc85716d6eb442d21c",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}