{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1666813",
    "entityType": "User",
    "nonce": "0x974a76b0420889246fd9ec053ccd5f55f50f355e4c3ff8ad8d937f51b6bee7f6",
    "signature": "0x3448c074e7fba87b126c53b675556a8a6406fda79d2af3466b70c40c53af9b00161184907623edb8e04f080b946a73f9bd7c5f4875526abdbb756e1b9fbdefb01b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}