{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16752",
    "entityType": "User",
    "nonce": "0xf29de96d51508e8839bb51bb4a514d5618fd347a229eb15257d0ba755acc37cd",
    "signature": "0xd88d5b9b6de4dbf0564888c385be1517d045dc21c6a77b6612bccb8fd64ea01611a60294461c4c02ee80325f2d79bd2fa5f1ec5fdc215ebffc5af410d23de02b1c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}