{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "49421",
    "entityType": "User",
    "nonce": "0x3dc1bd414146bb2c944d075f65a3f4c99975e0275b32e9d085a3a13694c35609",
    "signature": "0x71351c41665abfcd2f05997d615504d1b8634ffcdfe2bbece81c060c50b347d41c574fe036d9fcec77660256291c2058bc294d61793e662f87f68638410914941b",
    "signer": "0x57Ad6E2E3fFc5ABe9b5FE7DC3bF7c07c8cCf9Ccf",
    "userId": "571702334"
  }
}