{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "497775457",
    "entityType": "User",
    "nonce": "0x9e16967ff56d49810a6ecb55cee915a5819bfbf861cc5c4b20dc26a9b5553409",
    "signature": "0x4567dc56030e6c5bc1420cf6dde6642e74f1963c46e6aaace3e589b87dc6dddf5e552e0b7c5e61882bd7734a4641644d698b730d8f315e0a5460c2d96b01841e1b",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}