{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd73107e072deaa7de80a9f21186fb82b1ed6f290147d9ed889df2878e27085fe",
    "signature": "0xb5dca7c184d5d05310f178f35eb4f9fa4ee348ae4eb9dac9f637a4d0b263d34c6da09d3fa77398bc1e1f3dfd5437fbf3014a706cfd7d2ea8f47b6c669b4525851c",
    "signer": "0x8b61B87EFfC875d065c2aeFDb0424BA7d522ce17",
    "userId": "723815891"
  }
}