{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508547804",
    "entityType": "User",
    "nonce": "0x087f98f3a0bc48d65d907075eb6b9501d5dbe0f344f53751274b71ee7f0f94f5",
    "signature": "0x7ef9656c930fbbe9a98cb1fe18239f1ab9885febff84ec8fd28ca821fc6a302c47d9f3b29146f42a74ddc12edce339f58374f84a4c05d47833f23d356174424c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}