{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1902300",
    "entityType": "User",
    "nonce": "0x12e8cc9828a97e947f9565b8b0ec544181d72d7ba1137904ac8acfb60b227fc4",
    "signature": "0x852dfe85ee773708cc75f871e5ddebd715e4a39f46e954bb97636bd8ca03e50329c0e09778c2d4e2068647bf40eeddf60e0e3e88f2cb4e6230c10ca23193b3761c",
    "signer": "0xC4e7DcD6A5AC88f4E86b3459Bf65129acBdd3794",
    "userId": "108256647"
  }
}