{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "399822794",
    "entityType": "User",
    "nonce": "0xd60e77e4b85cd2440e0d9802c8c0c0588197bd04c0231698436007e439186818",
    "signature": "0x5da9be515a54abdc1a7b937ab82555ca583ab7c1f3a6565745c0345395eea33d5280dffd7feb14350bf86e2124e31d1475757ee8d8b34a17b73975f29f55be911b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}