{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "789767385",
    "entityType": "User",
    "nonce": "0x6c236e6f05b960c7b5285644f0c8c6dd4b82ddd72105200b388299a3443a46cc",
    "signature": "0x4d38fb8255825f73c2dabef489d9eef6a4f8130812d8da7b0d8056e6bfa6312c28ac716bd8de22f5fc5f06c02a243a210ec8d9824c835dea70b20b6674f12deb1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}