{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "528372079",
    "entityType": "User",
    "nonce": "0x3e96178c655f30931782eccbd497cafc8cd2255b44597212e50605707cd49198",
    "signature": "0x8bb3872e3c01ea8c31b80b544f443d0b0dbba4d0d310622b54053b7b957e19c165416d62374abe518d2f8c1167820ece9a9da1db763bb0da1b58f7eb0b25f5671c",
    "signer": "0xb18D2c0C8Aae7bA7C122784dDaB20C1f2876D3A3",
    "userId": "777619552"
  }
}