{
  "manageEntity": {
    "action": "Save",
    "entityId": "861103023",
    "entityType": "Track",
    "nonce": "0x4f45407b69b9b115f9a34df4ebf2469307436b6fa1ef8b05d90c9a52cb5e5e9c",
    "signature": "0xab6144d149f4e3c75ecbc8be1faa9a85de7fe99d4cbc66576353dd2236766bc93f40b5129ce77ee0e28f5e6580f253f0ef6d5ae18908ae554d9e8a5d2c058e8b1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}