{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xdb2169ac59bc296209869f100def49af7400557d0aa8e853c6d7afa033d1e66c",
    "signature": "0x751c85cbea8ab47963c649d46941564a7f4c447812ce36be74e42eeaaed2b4477f6bfe4a91e58228b7ae95ee0fc7287048708f07953fb6bf0ea22684ded459761b",
    "signer": "0x8A3C221553d44D8E4032DfcDbD8AEA10BBd3FD5f",
    "userId": "409835312"
  }
}