{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "752389",
    "entityType": "User",
    "nonce": "0xd20ffe4d34754645470892ddc03813c6c5453a2f7eaf73760022366a07e4134a",
    "signature": "0x5f2a4bac383165c9f23d03040848a5f47d74bb98a278153c7b8b6c0c052217861eb7f3503b961545d05b438c5316ed3dd2feb28e43932588ee766855ee5fef971b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}