{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9f62a9f03c56943f060beaff9374321164ba0072addac65bacca88942957161f",
    "signature": "0xf8e231d89001573bba44657a106a977889f02880aba9d8f6447eb84d6d06ee03712b2db50914f6f25fb581278b99a40b3bcbfee1beee053b2f198799255ece921b",
    "signer": "0x90508144365a4b20f9909C3C9b96a5aF240cC9F8",
    "userId": "330534898"
  }
}