{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2219b17cc1c50c376d9d24bc8500d83052943503f410bef009aa833019f429f0",
    "signature": "0xcd4b335caa07003c72c24a286379c115882b625437bf64f1285dffdd9f9e4c5006fd0907b6d83058ed840ca12fc4768a9530ae1d4cbb047c9dbfa55f0a62bdb31b",
    "signer": "0x7f590bEFD43b7cCcF038372CE50C813B4290A5f4",
    "userId": "297301449"
  }
}