{
  "manageEntity": {
    "action": "Save",
    "entityId": "714517723",
    "entityType": "Track",
    "nonce": "0xf48f7cb40203faf2fa240f6ea0b47ae06ec01d2e4c76e96515d3eaf9370cde0b",
    "signature": "0xcec7d18eaebc472f21f21bdec76c440267249f923e70c0f61a8e08cea64000b44d9f8deea495a4ae1f4590548ccafd7c9e69a3d34d0334d6512f04a3ff1ef3841b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}