{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "668",
    "entityType": "User",
    "nonce": "0x9aa47924d28b8f9f2f0e24d138338695155a432872beb3b1cb074af2507a06d9",
    "signature": "0x2353d282d73797e0e269a5b89013ca5cdeb100ec34eb0a71cb537d7c9b5ec1101a77d724ac8d2ba6622d02db56f623458b3ade7086bcf5f5aad72af4258cbb571c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}