{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "300785",
    "entityType": "User",
    "nonce": "0xf009847b07f252d4182a9653e2193f8099cc972753a486b6da913556e501c7aa",
    "signature": "0x2fd54e98ff3582d281f33a36557e6cadbb67d9623cf11a8665b845b145dc8e55512c8592b7015707c6c1cc09afe382ca4143b95b46c2f7ec2265945b9118eef21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}