{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "456716469",
    "entityType": "User",
    "nonce": "0x9880c58fb664193667c532412a813e719a7e04d3a30d057ab0000b21a8efe7ba",
    "signature": "0xbd1bebde80c3e056534a2d22f536e3a64cfc0ebb2e80f7319dbba42ea4f54b214e552d5e5e2018f7f884fa2668630254630489d459cd71ddab63583ee54995201b",
    "signer": "0x12EaF77464824447aA995e75Dd707B3e5246be9C",
    "userId": "409175645"
  }
}