{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "299157440",
    "entityType": "User",
    "nonce": "0x5bbde2ae85c6480b25eaeae0ab48e0e52aa824974a37f56ee40b02eb42be34c6",
    "signature": "0xf4bec3b11f7c011ca886458ff98e6dbc6b103644bb549dfdf3b24fd08df8bf6627ae93ed9dec3b6af49c201948d45e9273ec58f44e4c0d1df0ff5169c86637fd1c",
    "signer": "0x157D6bED7bB7A5D2bA4DDd2353158798F8744aC7",
    "userId": "587027717"
  }
}