{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "10373",
    "entityType": "User",
    "nonce": "0xddc597826cd73ccaa6d2b316bad85ba2810a97b520a5a29902c6724b9aa54f8e",
    "signature": "0xdc51db3bcfd149cc72b1e887f04ab7ad205a3e71f96a20ba8f62c4552c0b1b1d502c56247a0b6c5c2e50eaa063bd29d39ae3af6e893213099bf9281ba931eb3b1b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}