{
  "manageEntity": {
    "action": "Save",
    "entityId": "812929752",
    "entityType": "Track",
    "nonce": "0x47446674e4ba5e6b5af8a90873dfce89c236e2c2d0773714dca8292a23be8959",
    "signature": "0x0993e8d66216deef5bebe03ec707e707bda9ea9499b56329b94292ebd7555eba7a3954c28202950f4ca52503e5ed6faa444eb90eea6b89a3b05e922f1fcfc3db1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}