{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "740883",
    "entityType": "User",
    "nonce": "0xb95c0bd8a15daafb4c4bf5b9eff083f9875ba3b9a8857d6130dbac37f051c49a",
    "signature": "0x3550175a3c7e7bae29b28a418a88992ac8ad2be1f7ff09866af3a6692f1a9a9129906159952f300fe53c21210222b7cad76e3017b1915d60a2f8362301d37e181b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}