{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "723085841",
    "entityType": "User",
    "nonce": "0x99402cdc9441351bb3bcce47d51ee3b98ae97707125579ef5661ea71152817f3",
    "signature": "0x75c816bcedfe86214770bad18a688d951a35728ad4673baaa0abf027366363815046bb6ba1ac640584905beb043b0e602cbc09ec89ed96d4e59dc32e501c71761b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}