{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0xcdfc7d489d2616cb416a4050c959d78c61c28d87fbddae5e01d0b73782cc219c",
    "signature": "0xa4c6f9d44e5ffa001d54cf6dfae1be05688c8d82c2f43b5c7d6a6f3f12ac88ae646e91942eff09f2641aaa93f43b729c1ad8f5220845ea217c87ddb18e795f571b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}