{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "500830876",
    "entityType": "User",
    "nonce": "0x4f10396f000edda14ed6575c4df733be65dff3902ecb30e521a61d0fb5f98fe6",
    "signature": "0xc28fb2fbe81bf24bb39374b5003ab2185c50f11127df425fa8d6b08a3beff33c7e75a66fbfc4a2dc8af5ef161d637af70c1263d136e95f549124b098c0af6af31b",
    "signer": "0x4F25239639264500B1E4C11605663096eB10aF46",
    "userId": "621038209"
  }
}