{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "8403",
    "entityType": "User",
    "nonce": "0xa409560f54f2240fb2e21ebc936edac302320ea04f6951f22e87c315a6214198",
    "signature": "0xac6007cda0252493af2ae3c2e757c2c4a5142b7cdc6a79257c28d03c1c8f6cdc4c90472580024034fac2fa6dbd2b371310d9005c2011816bfcb34fcdf00451af1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}