{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "973301671",
    "entityType": "User",
    "nonce": "0xf0516c4bf79bc53652e5d9870ced8a18b79f2f6cd61e2e1f85958cac6aa6777c",
    "signature": "0x7b40611384929f082c533fa3d643bd6647edd2405f9b1e915b6fb9b298993d506350ed9dee1def0de8dce77a9cf02345e41b56b6c36c580abd8916b511faa7401c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}