{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "778507",
    "entityType": "User",
    "nonce": "0x287bee3805a690a5b1e39a5222b9bef1eeb9acd4f82907928a7659f87f8e7187",
    "signature": "0x9842d5747bc1f970ffa595903352459f1ad5af5e441178dabdd44079635cbaa93ce2e10a9117be9f372db47b33daf2f98ad4003efc43cb68bcf4ac478461e39f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}