{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "325",
    "entityType": "User",
    "nonce": "0xcb4ac93eb890432b116b80aaecd1e86a0e339e8a7ce40a0bd2b3bb0e1c2570ad",
    "signature": "0xfb6630d7b90bec80c4a2f96ee47f4dfd0da1cfa286c0d59a0ab7c6489951d47854b428eb6db8542de347d6a0608c5e42788171f065195e3179c396dcf4c4c4151c",
    "signer": "0xD7Db519a2A03374B0548c02822bE88402aef1E5b",
    "userId": "715241773"
  }
}