{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5b07a52020f2a21cb43cb5e5f597171290928ef04af04cfeff701cbc9d001dbe",
    "signature": "0xe054a2855db9c16847488f8143c56b8896318ec13cdfa26591325332bc0dc427228287a93c7a702b95a5d28877751365be7ab5a3346cf5a89e1d630627fa57ef1b",
    "signer": "0x5fFf561f49180ddDc64C036f9F45ae3910D35c54",
    "userId": "328797146"
  }
}