{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121616299",
    "entityType": "User",
    "nonce": "0x2bf964778a07302a58a3e59e0daade84275250152d6539e33daa5fd08263e89e",
    "signature": "0x30957ed2ece997553373697c7d5b96eb9ca8f1061eec2547c2e8cbb8208b08d1701acd22cf8d9228bbee6b29a3b163d9c8106ed04afa2453c93c72dae9df80641c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}