{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xaf792b9f1ddc707713c2f03c2b9cf5e2eb458586bde6688e7e815f530144a7bd",
    "signature": "0xaf13c8eca6f42d19b23a5384c1ad5f5b7dc7a81490d327fc89a30315ea4442267b383314dee96d271d61100d09359dc2d713fa6a0312e71e3e3b6691e95bcb9a1b",
    "signer": "0x5a3D8ee650e3AC49E3814789a0e2783f0bAFe395",
    "userId": "951735298"
  }
}