{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "103819",
    "entityType": "User",
    "nonce": "0x3da2e2d76761e8df49f8af22b6a4221653c7ecfde2166438a866c88fb3b41613",
    "signature": "0xd33ca783fc92f182d648f48af4c40c62559bd287567d87baa5775ee6edab8b8a1dac7015f7228768e23c1024f3ed35ffd6781a52c4d1209e6d834becadc02d951b",
    "signer": "0x1ECA0F6DD9Df100D61052dBc7c940eE29846e69c",
    "userId": "704556561"
  }
}