{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "199857",
    "entityType": "User",
    "nonce": "0x1e2a938aba4551b4705d9b9e9857386fe31699e398313e52471d086d6164fdfb",
    "signature": "0x9ee16c264555392711f3e0a2c9ccd30470330b5f875bae54eebaf80b51ae718c30ab5309c46f1069f34c1c6ae49e909780fd0f00054983ba4d43d42d285381121c",
    "signer": "0xc28F39d473d5C4cacc612630A8798a119D1Bb506",
    "userId": "901788935"
  }
}