{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "210748",
    "entityType": "User",
    "nonce": "0x9c50659bb9bc1f186afd1368d8b2d2f1437b1cbaaef53a98df354340b7028b25",
    "signature": "0x54d79783a6ca6297335ab5dae78cce816bea6ade3d413bbf141e10280174199c2308a1d27a28b21b8e371ece4f756e7d670439aaf437655d8dac3d2ab1dbcbb91b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}