{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114346652",
    "entityType": "Track",
    "nonce": "0x274870bd780bb546c20a40974ab304e5babdfe97266523be22bae5276e8e8c6d",
    "signature": "0x9f915d4f2abe7e0bfb8bc4807ea75f21e77165bc24b3b6bbf33913b4e1d0ea7f59adb7ecb4edb21b7904cfe2c2de654daaa0c7e2686b731a018153ccd44a3d6b1b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}