{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x21a5e343b3373db1405657dca3b2a49a591e35a0a40fdfbc0b8867e0a60acf83",
    "signature": "0x601f2ea6440a1fe68e8e3c9b935381f3090775aa7daa8fc285e24c19f54ec9f45725acde806c5339e5f4d27c0503abd2414bcb7bb2dc70336a87ce2c49ee72011b",
    "signer": "0x812B7A80dd633A71317D6686237dBdB80B36B2f5",
    "userId": "160012753"
  }
}