{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2b50f0a20123975e1ed16185e01ba34dc5fbd72cfea78c5e991b4935a077bf37",
    "signature": "0xd6df3ac611c3b171af9cfe7e4e8a1090b1cfa103c72c13991c880952d1639ed70ea6c9bf795bc51ded648b25b791616718c879de8f092517e52af18af0e586ff1b",
    "signer": "0x57B72EB07de2F234F10e779f1Ba99344cEa3B3A6",
    "userId": "873528115"
  }
}