{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843421708",
    "entityType": "User",
    "nonce": "0xd478c41318d1898078c560b1abeadc30fa82f59991b891e8b4ff759b99eaa9e9",
    "signature": "0xf54b145cc5401b58dba438d1e62b3bb408ec67742383f65dfbf7d770ea9df0ba455492781275e31eccc395b1286c0b71d1d3096972f907b6be35cd8028d33aff1c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}