{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "235421",
    "entityType": "User",
    "nonce": "0x790ae0915dd3a2bfdcc77b6e88eb937534bb239ccf5e270e4f4aaa8451e13d72",
    "signature": "0x4f5d19a5b7b8fee993332b231cae05c0829955456a92ec0654ab9b2fe0f6b6927fcef18d3c9faa0189983205fcd7879fefd324c94d09f8f6ad51d9e31b8a5d9c1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}