{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "908879704",
    "entityType": "User",
    "nonce": "0x5728d35c979c8e4368378a9c9acd6b46972c25587b4e25d7e94f6c7371619b8d",
    "signature": "0x770c6c5d526b4af76f379d11397d00cc143c217ebb257d680542d3f48c6ea700129c16d2d3f93e51d39537ed0770c838b898535a08bd5bd9ae15e5d7a3956f951c",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}