{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x49cece99deeacc493724651456fc9d08de6c91f5e2e79497f3770ba5ef586fab",
    "signature": "0x37662aec8355add540dc204c826b2737fbbb707ce52682e3bc50bba3ff86d121457b9f9197d7668fc515787c8d2fa0f143f574c63b2ffcaead08c311f7198fd01c",
    "signer": "0xf76Be3e57D30ebb176cA7D31f49157c7f56E6b0D",
    "userId": "204302128"
  }
}