{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4220",
    "entityType": "User",
    "nonce": "0x44b82b6dba94aba4dfd904b58045cd7e172f123fac13d7cd226275626239f04a",
    "signature": "0x99da77742f0fd01de3044e1cc3a33de6138bce9eb45a5ce68f0ebd0b8f198ca449fc587fc49588a8a9938d758d79e14d949ca7a5a5b08f8a5dd3fa4f138a1dd31c",
    "signer": "0x3CEbf9bfE1b24355cBC348701860d601E226Dfbb",
    "userId": "172240066"
  }
}