{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "138345",
    "entityType": "User",
    "nonce": "0x82d76e53da42a560b2e5230c8a087147b2a75c6d70453b375790654dec6fecf0",
    "signature": "0x3f0ea66a00de3139fa9f5a61351196760ab6d6a4f15f61db376b39fc9d8c0e66137a4d33e836abddbc015ddd94d7a0dbc2b5b5fec7b7d40e242eeeec0f25ccdb1c",
    "signer": "0x9c1a2996a6DCe12e947BD7C8A755b6150A3eD5f4",
    "userId": "474113241"
  }
}