{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "428192787",
    "entityType": "User",
    "nonce": "0x5d689c3bf627d5afe30f2426db239316fd79c07d4990b9ca4cd05d4e3314d82a",
    "signature": "0xd721dd3564c1c0a23e350c80e48e98f4d7150f30b7b6d04481bc9b2a17622a2b7015720c9dfcb5f4a7ce38d4b142beaa7d553b34e9254a2e9c4999678cefbb011c",
    "signer": "0xf76Be3e57D30ebb176cA7D31f49157c7f56E6b0D",
    "userId": "204302128"
  }
}