{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x3d50fdbc4f131a11ac0237fb599cf3d98e19589b491913236a417e8912a4bcaa",
    "signature": "0xfc1d23b210c9a11de3f48fdeaa76a42069cffa8ecdf749cbdb005643cbb8f7e07aee8098125e56aefcec88df8c97f46d6e2618fee9c758acc80e95dfe2f8a7611c",
    "signer": "0xC0f8D2C092ae50e1512d827eBeb817e1ea4112E0",
    "userId": "451729998"
  }
}