{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "428941685",
    "entityType": "User",
    "nonce": "0xdf15e4ad272fea498d86623d34348e6e81b81a54841740c0bbaa800de449c558",
    "signature": "0x3663830f24caa1d62fcb2419548fdc2da70592d5f7590f1f8e9a5e6f78ea2055648faf70e2e4bc047779950e8a69977b2a11606d024e8c883d51d33e85708a991b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}