{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512214950",
    "entityType": "User",
    "nonce": "0x12019684d8943b48b7371963d700e629d7d44478da72014ebd9a84eff306239b",
    "signature": "0x8c9cbed923e1d7b6cd41a41b29531e9c3f69922d9620ef6f2d73de8bdab07418453ac664611bb81b2230542e5186500891b70b759b74a3310f3c1b205bd778231b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}