{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18192",
    "entityType": "User",
    "nonce": "0x5270e699d6fc151955e49b4bb7d3803ce95a6775d06ba4a5d641b150c454a1c7",
    "signature": "0x68f2a207b31fa6258f50a04d5cd4a40598eb0c71486d0d6c9bf886d62c7755f07e366f78ccbd440e33d3f22345464ef6e41e5d0d085c77ebb41416b2a1335adc1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}