{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0d7dcea6a5e5af6c0751e8669ba10e6735101b1df6d469a52e68f6f16a405650",
    "signature": "0x916167e4f2e251158de4aa2067708575f2f4d8de2af8cc97fa55e2cda7ad7d390200b7a412da8cfd31415091f5522b49e7598310737fe3f33e64372be0fff8721c",
    "signer": "0xc8216497d8C89441AA03fE0D024c13CcA03CD7Bc",
    "userId": "322510915"
  }
}