{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "342990",
    "entityType": "User",
    "nonce": "0xe51eca8175b01c560bda207ad1f00e812c50778731bafded88f6487fde23d38c",
    "signature": "0x569f7b41ce9b8fca93eafd1db930f81cf31c3e7d16d9e8d5bb6d9948b3c5d72d5afc8168d12ca3f28974e782e033fa74043a35fe01ebef024ae9247ab47fed481b",
    "signer": "0x90D649f24D80ffa4231f650fBE75e9Af27283497",
    "userId": "367633290"
  }
}