{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "402",
    "entityType": "User",
    "nonce": "0x75403e3ebbb443b521d99f3d5ffd74be2db74d2825196bfb360c157e99ed15aa",
    "signature": "0xe0a422431b8899d96051d4cdcab6ca410cbfee88ee1e87537b0cc02ecb6d9b9813bd82baf723bc194c851460c8e079271fb3d44684cb7cc79617d0a3c14edf181c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}