{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2f28faf7be037f1ec5571b036e5cf03483f384a62326924d7c11728a3c25a27a",
    "signature": "0x10b1be0f1819204aff81a3065cbe42134c8e5a03eec16f3b30f03eb091bf2adf3336c53b55c93ff23a3f71b729946f5d65dd0fd0e21ea31ea20874bceab2ea2b1c",
    "signer": "0x9B2D4b4FdCEf78AE84eB6231636C391cE298970a",
    "userId": "664883546"
  }
}