{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "681465788",
    "entityType": "User",
    "nonce": "0x56776b553bcc502f02abecc7331bd883aca8c4b9f8b6d58e941489098e1253ed",
    "signature": "0x9abd7b0f70e39ead7bb9f37d3327867373796039cb806e530c48ce56763370955b7266750eaaa7fdb851bdea25ed3c0dbea58e866391f30afd567d95a8c7f0691b",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}