{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0xaf7604b41f7525df0ef1a759a6651acb5bee2eb220d9e27c81bb62bc9267418c",
    "signature": "0x7ea6bf0a4c7387dad8eda35d26f66a64adff18c091a13f798cdcad83fd1af2d509ddd2a13ef7ef1d07389c198f6942d6f6e84f082b3a6aa4f48d040670fcc59d1b",
    "signer": "0x31fdBb0E5a7aAAe160b470d8DC722F86D8fDA857",
    "userId": "458302619"
  }
}