{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648802251",
    "entityType": "User",
    "nonce": "0x859780675fc8655a84601e6a04419c1e770f05b6bbd0b6273a09abdc4af2b2c7",
    "signature": "0xd8d7bd08e57fe4708dc2414fcad718dd0ce217058d0b945183c161495f4830260ec14802b7cd878772668e84009f686eb5ce002afdb348fa9e62ec821eaf00311c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}