{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x30d22d488c1d3b26813d78ec2ef9e4c7b4ccfd24d343864973229f85cdfbcf89",
    "signature": "0x59033a764a7e9b71bcff2f8bbe71d2ff185e0a91c3aa16dbaf365088ddd8c05c3880a3aeb8f5cb02d3b9fb82ba3f549720fc21ce7580b047946d48453d3d8e811b",
    "signer": "0x74Fc36aBC98608deCb410C742455da22Fa04d7A0",
    "userId": "664190072"
  }
}