{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21754",
    "entityType": "User",
    "nonce": "0xa9ebadb105b173c61237b2fbdd489a21024012e5753535ab11ccb0c3cdd1689f",
    "signature": "0x2f0c81b5986be7bff3e8d7bad657cc27da3eb37380a06249895bc836a75d14bd6cd6d33d244234e76e83ba2a906735c58a1aa481b551228c5d53463fe4e579d31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}