{
  "manageEntity": {
    "action": "Save",
    "entityId": "1785481390",
    "entityType": "Track",
    "nonce": "0x9bde19f609063a5a8773eef6a9f42c768ff6018728b630efe11b6ae8051e2ab6",
    "signature": "0x4450642246899a2a8fab3ab6c67aefc962b6a122d4adb806613c78ddf8a9831e6145c36141a19ee68cbc500b35e8d59e543149237400f26f35e91f9e0d4b00c61b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}