{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "647051955",
    "entityType": "User",
    "nonce": "0x80c8d2cf6cf907ebf84ec3e6f87d02981bbad49fd3479d419b0e1fd47e0b0a0e",
    "signature": "0x28ac08d2670f50bd08f51fee2ec6333630988bf066771cdac047b4b388d4b6a00a213319cad110a1f48db7aa729b98e2a4c385d48957cbcc90d37af8121e5e371b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}