{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0f4b209a02a4f328473cc808a3700ffa02e999816d579817bd540643db0f81d5",
    "signature": "0x993adef3671ad4bd12b681a448810cc12501842fb739258482a79bab16b0797274729dba9a3921d082fca6ad3b35c84c3f4e0dc7f2028be8efa78055b4d25dff1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}