{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc3d55adadfa04f0d74312b81cb5810f50f3e7d90620bfcdb0450c9d53b2fdea2",
    "signature": "0xd929edcf6913944aa5db82ec8f31de1146521fb1bf97a87af73e03c223c445e660fd52900c68ddf53e300d70aaf3076518525d1c2b1c7a5a18296d606e62f9901b",
    "signer": "0xf031164674d0139B4df313A02E0a0C4148fdb8B9",
    "userId": "397233277"
  }
}