{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12902",
    "entityType": "User",
    "nonce": "0xb716433ab739dbb9bfde92b66f90c7b7344bff8dec58f4fd72f892fbe204e424",
    "signature": "0xcdbd67ef45f68bada4b4a5b63f02a5a53bd4efbef8faaeccfaf155676ffae55f4fb5a4c11dce8924a78472569706cbd74a343036638dd470d97ddfb91eb32e841b",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}