{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x81958fae53d50ad625b0c1ea198dc9e2cca6a14b1c8fa178354469744ab73179",
    "signature": "0xfb58f42d83a5cf0541a02d964b1bd3db6c8fbb6f1046843c74ec3e983807f3d27a32fd2dca596ed89fbddb823441d0fd37ee13476c0f7116861f72955290e4a41b",
    "signer": "0xD9c3fe8D3f90E3a78Ee983Ae39fd04380D12f16d",
    "userId": "600786367"
  }
}