{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa9fcf938261539c3d2a4ad66335db6b5dcc5d353148a48310aaf1fac903ed733",
    "signature": "0xe4fb75b3046fb93c2a6c59948cc0ae5c780190f040db22595d8377734d7d688827d22677b9c49ee597cbb27177cf6c454e398ccddb4254aa3dfbb28a9a5ff9591c",
    "signer": "0xb4A0d67357A27C413B5930Adb975d62fF238D5Fc",
    "userId": "8989850"
  }
}