{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620550962",
    "entityType": "User",
    "nonce": "0x6b244f8641357465837114cecb73746c4165eb49946f41dfff91642402260c06",
    "signature": "0xe224a9cfdfe77b0d80c48536e089f5ed11fbf12f46c6cc28e9f8acedfce5921b307d6198b26f676eb5a6c3762d6f3106f7716b9814ffb812f3da93da057613a31b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}