{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "737872723",
    "entityType": "User",
    "nonce": "0xff89dbad56cad3973278091e76eb590ad7e6e4da73c957275752215b6371e6c9",
    "signature": "0x7fb4f679487229c859f1d3c92af5b98415e163c988d0e1e04f7579b345d75a6936e7a4e146a6f1d264c75fcc6a1fda026298fe6cc6e6974cae6d9b6a0c5f13bc1b",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}