{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "255776412",
    "entityType": "User",
    "nonce": "0x71c7d2fe9be2d5a7c56010311ea4a761f1780e3551e7b8bb92de146da2ccd697",
    "signature": "0xa01e4a8642aa03e10613c9abca946708fd46f8ab07725eb077638d2384f8a9786dcf2eea532931e301b1979fa3d5633655f12b603b3e82005520884dffd8eb291c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}