{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8a1d0b57d8444bcbb91f2f1c2950849e3af7201ffc7cb4d291e0a055906a7d82",
    "signature": "0x8e314f0653fd702767d7d3c798701ff786d0acd615dd0e638f8828d43da0b82a1f6f2a3f1ccd6ca0a84b82f92754461c947f18f41b9f79aef35c23a46fc823ba1b",
    "signer": "0x4af4E9B1aFBc8e3a6f2fAB9EC006D58066ca6fD6",
    "userId": "473569856"
  }
}