{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121412",
    "entityType": "User",
    "nonce": "0x203856b32f126c2068a2ff14db26b85ac26ba57a5a7b804859b9769d56a82946",
    "signature": "0xf37f3d181fead1051ad819b51ef5f3d659cbaf597501e414defc33fb2b7511ec025f9d922bcb4870ab65f61d87021e0766510575b0f3f347c4749fbac854f5a91b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}