{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x032991053750a1b6ce256bda004664c208c73b640fe766f2d9636d4c171811f2",
    "signature": "0xeadb8c6ebfc650cab4432d6dde8b7e8def3986b70dfb45a66c5dc85f1052a7320da0fb6935af7926a99b0e414961afdffe0efb548af5e002078be6247e337a231c",
    "signer": "0x488e8Cc0aa4A4A170544982D50B2616e42ca6c67",
    "userId": "386938284"
  }
}