{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x399a680ece4e25ade4d833d8e755fb84b2e5bf64170ac256f87a2ea64806d4de",
    "signature": "0x6b32c0dc12761012915d79e45e4790427adc13a306829d9a6b5a10eab321bb38081f3fc8ff0a0048c2c1da2f07ea10abd7a7491ae693f0d83921422273c7defc1c",
    "signer": "0xEEF1ced65C136Bcd432f7E04e0e9b9b6d761ed45",
    "userId": "738410187"
  }
}