{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1721",
    "entityType": "User",
    "nonce": "0x46a2c719b08674661c78a94220e2e3c0e6bb569c05368c69da9458c063e6417a",
    "signature": "0x04a0cd71138c9a2de4bd75c9b6d86717698b7491ba079c9ad65dc0d48676fc9e643dd4bca3c3af750a416b18b22f97fc07e710c3fe207419afe43cd1e5f0e8171b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}