{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843421708",
    "entityType": "User",
    "nonce": "0x0ca0b00624d849419e1243c9eb8d237a57b3a9f213259b9175ed5aa92407d456",
    "signature": "0x50727cdf174e5cd9dc9669cdc149fbee3e2d4e12eec25e8ccf99056a5f70e36979b968d640456242561dc43156eb69d83e8f3082f19f89239aac1e87ff60edc31b",
    "signer": "0x4a4E686a6442e2Fc2495a7d4363B25c583Ea3c3a",
    "userId": "34815"
  }
}