{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "437219",
    "entityType": "User",
    "nonce": "0xdb861475aef185f662e9a1d381209d89adfa78ff32274b9436f76c8dd2d59094",
    "signature": "0x73de1be21af0686c9f4ae06e11f41cf824a256c90179814a214bdd59f0c1f4b97d45ffe65d0f4a17476241b60c2a098811afef3a523cb97a35544498089d55251c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}