{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0xc35cb6fbd87a13aab6d1c640b3fc5ae0cd71cfb506d31f504a116ba21e264658",
    "signature": "0x0a18aea5dd097914a88ee7665c122991074ca2020e1a395ef881a9377a7541730a5c35148ed59a0d459f0dca52cc200d6d26035ab39f568c0cf4304b15e3da921b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}