{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "619242476",
    "entityType": "User",
    "nonce": "0xb4ec77a2c005373d75b395a9aa451252dfebf0e3f754bc810984f8e4ae62112e",
    "signature": "0x3099dc33ef5340c09d18db0f33ec9bee427c5a7870fe046c5f4b34bc7e0edc3e358dfa36ee94dae38e078b8c9c04014849b83b2abe6baa9399f2057ce1052e1c1c",
    "signer": "0x20690bD900B04126EBFAF3620E46F1645188CD62",
    "userId": "16326"
  }
}