{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3290",
    "entityType": "User",
    "nonce": "0x5ccc5707683aaec23a49d47fa15f7cd5a263feafca21a16791094ea5ebd93e7f",
    "signature": "0x837e5d1143c089f04f7b7623372fb61c2a86a97efb016e2dceb18c04148310970b27b63802f004fb4f081bb38c6da20c77844e413ba80e85e40ab9cedeed25671b",
    "signer": "0xD7Db519a2A03374B0548c02822bE88402aef1E5b",
    "userId": "715241773"
  }
}