{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xcb1973f620be5618db4d67e2218065adad147b83341cbe98ddd147ab25b07fa8",
    "signature": "0x007c8a659317b346444fc42596287d8e37dbef9a0e82a14ed0028a4d4e0107697f7fc2ac7fddde9ecfb1320a9c2de0c593d13b32d72aa6da216dd9e3b7a1254e1b",
    "signer": "0x537FeA657eFcF11815a94831D95e49f18F0250FB",
    "userId": "870901302"
  }
}