{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18192",
    "entityType": "User",
    "nonce": "0x11e5cf92aebc89963d26266047cc9c349098ba23a14e0a7d0e73503de155cdda",
    "signature": "0x88d9af3e731eec0d782635dbf40371dc9759b803a2de7f5158116560081b3ac21b3959f147ab8d093473a545db8eaade0bc8abcabefb3ef56a9d9642c958a83c1b",
    "signer": "0x51E08E74E29DCd09DdEeF4713C607E308bcD0411",
    "userId": "123102876"
  }
}