{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x7ce344cafd75afe83a6fc9b7aba32ba7a29ef66c953d7ceb20a4e600ec41373a",
    "signature": "0x26bb0255924a3e580b3e7c2dd33dcce0d29653574063553c42bc934de4f3535f327794b58be52ee20fbfeb674af903b14936213c6de772f27d49470cd093a9821b",
    "signer": "0x1874B7817bcc33522bD9D33b6cb197A1Ed939E51",
    "userId": "235421"
  }
}