{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xf45d417de616431350f38fdf441eee7204daa2301ca4441f2302e00c7c411b2f",
    "signature": "0x201bbd03a2e82c68398b2617586b7b60766f9282abddaf1fe4b7b9a60f2ba6af5a7ce4948903a52b50d1f4b3694db0860bab507b049ac51da7dd23e1797dde1f1b",
    "signer": "0xf2A3959FD8c093454867658F3230042b9388B84B",
    "userId": "387870391"
  }
}