{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200080308",
    "entityType": "User",
    "nonce": "0x204c1b543f48caf5538ddc1f0d738c809a8028d172e8e046d880a4f6f4ca47ad",
    "signature": "0xe621ac1533cb84fbcaa19d692c7275dbae9b7c1194945b9fa3e339201b0203f52220c3904e386e7f75bf779980ffe567a929318ca29497b3dfcc60cb0af1e8171c",
    "signer": "0x1472Fec023A32bFDB4d9d8dD1C920b2DD601638F",
    "userId": "452206810"
  }
}