{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "398755753",
    "entityType": "User",
    "nonce": "0xff4d09d014f2a4a43dc91a0f094282218801db19e18fe9c56e2f572bf4aa7d96",
    "signature": "0x9dcaa30d37420b2613ce28c22dc16d4e0c06c334d7e791939d81f8e10b88877a2decef0e320a6356dc27d612a1da7a1a1ecb47e8cde49bae81c89dbccc5163f21b",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}