{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xab7cb5e8f4f1834cc9aaf15e1929c9ead1e7ddb11828c5e301de4f2f69f2fecf",
    "signature": "0x0ef23a6578e9ab0903cf86e077f5aa579e165deb8fd557ef4ed8a5f3b102f0bc77a87b343ba0ba259ebbdcf1c11a3581baa5ea85cd006b74c37e23ca5d81768a1c",
    "signer": "0x1064D9Ff9a816f9Eea65d40A4d7Ca630f9b5D822",
    "userId": "898921712"
  }
}