{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "819568368",
    "entityType": "User",
    "nonce": "0x6f2d817a824f858df0cde1ad1849c15e826c2d40c1eedc5e91a6d8610845c840",
    "signature": "0x4bd433cca4f86c09f796912ec46c14206ee5794f7bec6608a3d4b76e1891d9a341c8ff59494218fdae61e40ffe025b8d2e4aa7fee0b1ac01cd603e641be1f3401b",
    "signer": "0x14fa63A530B7d9254d20B110AAc25ABF49fbfa9d",
    "userId": "182428"
  }
}