{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x37afb81be08b6f4d655f15ce779916d36b3b57a99865a75ca0b74223e8b8b1e5",
    "signature": "0xc76a31152b24c294970d4b55e3128af76cd3c7ea22b5b61d16c66f8e1163e55f64d6800481700c8744f5e5389169471511df0b231733403fa448e419035146981c",
    "signer": "0xD88906d1FB1bDc2f219b6b63EFA064C13946Ee5D",
    "userId": "12456385"
  }
}