{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "490080902",
    "entityType": "User",
    "nonce": "0x2154a726e268f4d97acb53e6aa371cd8d436f542deab2838788f920297787918",
    "signature": "0x532e37787656fc09a93c047d401c4b0ea69b6b718ad4409af5f6fa3885f381713e4e24f747542298488760def4fc28e4816babde9cb042425fe78b2ff086b75b1c",
    "signer": "0x98591a180A20DF036EB2C9D2c24B449E65939Df5",
    "userId": "338604526"
  }
}