{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x618c656a6436888c86c33e1cf16dd803cd109b0333d30bdc34d4cec2f24a29f9",
    "signature": "0x1ab93f079fc0cd6d399d3bda32cbcbbc1ccb4a9170878b9aa992a014b9aed04f44b4bd437ecaaae6ba4e1915c06b02ef4930f57eac0d3b588286227ac7d7517c1c",
    "signer": "0x4648E953CAccF93cd7BbEbE71B94482047dFbd34",
    "userId": "935087866"
  }
}