{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7519",
    "entityType": "User",
    "nonce": "0x38b303bdf3c050828bc84e1e06ed8da7eceb2183c4c8db5140ec84ad7315af66",
    "signature": "0x2712fb61ad9f527814adf18dd17069088fe16862a386d64ad3673674aae0a4532baca541e41d4139692415a1e11f4b186da401ae6f2f15b3aacf722f0820bd631c",
    "signer": "0x243f92B83d056f818b9b95664A8B7A86805A3E71",
    "userId": "111448"
  }
}