{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "442640",
    "entityType": "User",
    "nonce": "0xf823699efe909ae4c817b58c1d43500cca41c889aeeec7687510df6712164de2",
    "signature": "0x5704d95e99ed9e26e3b7fb98f85258afaf18a1b23503a06622faf29a2a70ec4606ce956f94da10290d1957ffdfd255044babc50118dc95d38ccc712a4e14adc01b",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}