{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "354",
    "entityType": "User",
    "nonce": "0x742acbf89c47f292825262abbc8271ce1bf44dda3e2fa4b364fbc085c1c26900",
    "signature": "0xca81026adffc7c399d48d2e0069d7cf02d4f09ecc86616a1963afecc17090586281e3abb58923c649f340611f7742e4be7a938ea2bd229af8adae82d2b836b1d1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}