{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620449233",
    "entityType": "User",
    "nonce": "0x995625f9b9f128fd4ddaf879397006071cf1aeae4ab2f72eb6a06487bc8037cc",
    "signature": "0x6aa360dd7fb381ce3c0afdd928973218a11c7f83b87a2bcede023ce9d066b0521c1dddf7be3b77e726a883376990ac4874b99d96cd73e773153b839945585e321c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}