{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "599112855",
    "entityType": "User",
    "nonce": "0x418afc844f97cc9e1ffee40b3d618505e25f720e9ed613f3579eb654106348af",
    "signature": "0x15e8c43b063560cf4be54f7e8b0d147084c8d9459f023b0109e5129b81007a213daa694346b5c9a9e7098664145bd2ffb2be709e471dc79daf567186eb631a291b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}