{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "108203",
    "entityType": "User",
    "nonce": "0x4f3f6f4710e7547696c99e837b79e47d005bba836cc855b4155a8a3ca026a1af",
    "signature": "0x5b4d501964c5761decb2cfce2b8f4f2a2f7c5f2f7a82e58cd04df8988363d4f939d3c4ec33730191eb86c4ffa85268e8317a0a5cb3de2c27ca62cb23d5e3043e1b",
    "signer": "0x7fdeEB144300AC6b1Be0E83d8f006b2D3140F73D",
    "userId": "325377357"
  }
}