{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1683",
    "entityType": "User",
    "nonce": "0xbd496e2669ec8a325087412a907afcb76c648d03a328691ea73afd3099b6eb10",
    "signature": "0x5d57764b146ae3d10b950bb743c6afd46d9810b968e895dbd054ad8738eebe0905612bca291a5992532f59bf26e3b5b41a399d8cc68e4177c8579ea7c6ef8d3a1b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}