{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648443373",
    "entityType": "User",
    "nonce": "0x72de64969415d62e7e165c55a5d9de00bd6d266989f17ab8d09e715006e101df",
    "signature": "0xf24b8a0ef2306a5d78e36846d87b96ec8d9164223e7fca7c116ba3f02e0498b33e0c67acc90fc9d95e688dd23e4d4e188747c880d40f8a8b50e4b50cfccd41171b",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}