{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5a4564cde18f30621acb924f87b6e1febc8c04dd1acbd792114fc5183e28ea06",
    "signature": "0x122d98e2f94db4f6cb20358dabdfc48720bc85785c0d8b8217818e42a9764c3e3a6074f698c5f80dbec4d099c8e901eb6f24bbd5ddefd5a9f368b85ec67e291b1b",
    "signer": "0x8438492439282348CD48095329F62f854C69890F",
    "userId": "927921407"
  }
}