{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x542c2adb6b90b9473d3f4912e5a6991e11f0d288848a1052f108405addafefc4",
    "signature": "0xc69840ba67d22090bbf7f45fd39a7f0428dfb13f376aa3d2f466f1e6ff8851ed07940359b3c2ceb581bd8192b0a9fb0019ff0c8adfe3f20a8d1332f18015f03b1c",
    "signer": "0xcdc1d9000dBd1F390f58e38c27F386FD3F5B1260",
    "userId": "714558680"
  }
}