{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "748910",
    "entityType": "User",
    "nonce": "0x7208c24187b1530a72f12e23cfd1cf02bdf216fb8f9ad1f9540198f1f38f7674",
    "signature": "0xb7607f782ee6f205358133ef7ebe47d5a76af726912736dec71376df83fe82e923719779fbf993485edcdf232ab95e9db0cdfba6e6bff8f83150054afd3131e31b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}