{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "881446128",
    "entityType": "User",
    "nonce": "0x559d2a23bea870ca106b68a6d21348123a59148b77bc9a68ded6b19f692c8cb5",
    "signature": "0xf15acf68428a9bbd82ea6beef805150026b32348d8336006c53bd506106d40157599f0810a197d4c9adb6621c1421dccb269494ba6fc6cfdcd1c744721d508ed1c",
    "signer": "0x720537125Aa4b451266209E0d508D7576a4bAF94",
    "userId": "942771296"
  }
}