{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "137993",
    "entityType": "User",
    "nonce": "0x72f0d25fcf0fadf6182f7ccfa231983762030f91f46e4f268615d2cf6c9f91ca",
    "signature": "0xb589f60918cdec7d591f213641d81c8ac1f62b091bbb17205f101dae264a1a2a16f892c7e0006b8fe2335ab82ff0a7416c4b956cb525cd641dd6f0fc6b6fe7091c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}