{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "778523",
    "entityType": "User",
    "nonce": "0xa8e56343e84b800efb0de0aa81e8067ff9865143badab42199d6a09f99903b39",
    "signature": "0xff76287fcab7231da3f68f8df81d3446c567c9f12c1c43f9e85028e20c5d67767a949d3032d0b180a62cd4ba01c9d168243cc6455e80cb770b611af3f6c2491d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}