{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "837713671",
    "entityType": "User",
    "nonce": "0xe10f28b434544fd3fcdf7ef00b2801e2c45b45d48b4e107fdd254cfaeda92d92",
    "signature": "0x435b7e4811102bc7df6bbc2eef3deadd88980b985aa21c5b2846b1d2db56d0bf0ddbc3fc4b0323c0acf97ffdd25dfdfc8d92a656d1d37cbffc9631f097acb0511c",
    "signer": "0xd12A323399559A3773F865c8F21031bc39c29135",
    "userId": "219968466"
  }
}