{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990579",
    "entityType": "User",
    "nonce": "0xb6efa9252e59ff996670a3f7cd06e58bfd18668ff373c584048b8b01dedf28ab",
    "signature": "0x99e6a6f8af8a3f4f1587792653e346693c8183067673e972d8dd6c07f5fa66f11a8790f6981e2acdaac14f7bbc22eb75fb9d235b9e36261d1861f871b73f517e1b",
    "signer": "0x40E8E224E8F8a9f835e4dc8851Da72DCEd75986F",
    "userId": "504092010"
  }
}