{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1708421",
    "entityType": "User",
    "nonce": "0xe4c8ff65b0c75aa049cfa5a4433f21d2ffe2b1a77c4d65ef43842595f43af8e0",
    "signature": "0x99e19c3d3e2faa3525d817506864568484433ebbb7aa98dd4fb2743dfcacbf743e0de00b9b6f41a92612845ed7bcd50c96901deb65db62de908cd1b9364192dd1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}