{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x37c483ef719f842bc1d8b2164ea02eba6f6a8674bb9e777dae447819d79f1795",
    "signature": "0xb5e2b45635d949ea79152538885b7f32713bdc70c23156fbb007f0c47861b2f1495c633e1851a65c40629c829abbe3d60d5e0f248e7b3fc6cf140eba54eee5ce1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}