{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "668833",
    "entityType": "User",
    "nonce": "0x711815ca3fc727dfef5dd87fbd48b599db6340ec84df2e202a35984181ba354e",
    "signature": "0x31a998b035945421468294a5a109411ea215235828fa0a25e87b04a727eb887b652a4acb7590339124e794153569c95690dc9add7740adc84f4d0355823d28131c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}