{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfc8a51556e8b162760963d94d71147633c6433965ae7e9f9a6ef15c44cf53340",
    "signature": "0x4cd0ef3e9857aeef57f1d738459948746f4223b2a0bf0539709dfb1364689d027726d1af8cc165368f6791efd1f30972f46abb6a67ac9b34a1645c1bbb7ee5a41b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}