{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "319758166",
    "entityType": "User",
    "nonce": "0x7e5968128d57aa233f0d8955786b1b806db70ffe1d5f3d8c5b85c0d74873b33f",
    "signature": "0xcd7103c0ce209b834e90a75d37ad6c9e401ec8d57a84910ad3fb7d98211d58db5a7c2dd71d90a3597cc858a007fdbbd8b230cbde18fd937ae474acbdcc5c56dc1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}