{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x8917723c825694800e81d5378fde43d67dc843aaf3bc24ef534997c9fbd71b9a",
    "signature": "0xd37116b2afce2c54988709d889f1650840e16bc3a29ba9919199eb4d5a4386a40afb614821b8518c57bcc4998ea1d593bb828f53d042ee3d0e00a585f2619c1f1c",
    "signer": "0x2B55314d733BC60522711F9B9914f271d97aDD6B",
    "userId": "224685891"
  }
}