{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "625897998",
    "entityType": "User",
    "nonce": "0x6a39c164aac3c03974e9eb5e7500968e6f78ebc025baeb59000547248bf58f85",
    "signature": "0xad12ecbe0449233549cd8582be3f51f3506ecd3955b797c28f59b08816dde1192b26bf006d1023fe145f55dda8d1f9ebbbe0fbda74ec8fe844c7577e8d007d291b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}