{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0x1c97ab38fc7d8c751958da850fef43e96083d4666cdb58bdda1499a6f5d17693",
    "signature": "0x99c93dd5560658a51a7491b03f6ea0aa8aa43ce154bd83686724feb5901a32ff61dd06f2ae7bf968fef0008b3bf255d70ac36e7d4caf760e4110843eff6d36421c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}