{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "438818532",
    "entityType": "User",
    "nonce": "0x053cc3c4f86e02fb639ac15c81245e0559e60cf572bc9209b0ebdd9f58ca7f35",
    "signature": "0x8caffceba7879406f67951cb4ca792edcfb9a2e0a8c77f07454fc4bad9ea796b394846ba4515f72739ddce651beccfbfd5a2a011a73e8d07fdea1a0c7600b8f71b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}