{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "538529159",
    "entityType": "User",
    "nonce": "0x54cc614c73c159d05ecc4165e4d343cd926b690a3d426654d086477136099328",
    "signature": "0x9157e01a1e245a13070cc74ab2839fb650174ae389ce500ad0c76c5973ef2968730e4226ea0a16a9f9246f41770e67b8edfb37ac0a8d2765c80f8f6f984895081b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}