{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "423422344",
    "entityType": "User",
    "nonce": "0x39fb7d9a821a2ea37a4524ec00f71adcb74656989482e963114702d506abce6f",
    "signature": "0x7634f957c2951d6a204dd670edb2f957ed4e2760c78562eccf787d00df818ad71f33f9655bf286a123f51478a4a4a9bc1f12e45215fc62ce9dc29310feea008a1b",
    "signer": "0xFa074f848Ca977aCBc270CBbfd4c375c210eB1cA",
    "userId": "939103135"
  }
}