{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508263176",
    "entityType": "User",
    "nonce": "0xe1cf56c079d2d0db90c80cb8deba3f37d53000a7aa1f9798d03567b048168fb1",
    "signature": "0x6a7962eabb60628df6a32499c3393127586dab3bea136bf0885815749a714da81603909ad48196cecf8f1f8322bff7a594dd0da1ce102128fdfd4bc339ce98d41c",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}