{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "753157",
    "entityType": "User",
    "nonce": "0x759b5007673d64e1e78d97eeca356f1cd0edda246824cb566b0ecae7f64196cf",
    "signature": "0x7ffc6a6791c86823c7f4b624da7020dd5e8bf706d82eeaf50db607c329045ebf4a0bbc5ab7e7e6119caa3ccb9f0e88fdad80db85c04e6d9258cc95b8a03c8fe21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}