{
  "manageEntity": {
    "action": "Save",
    "entityId": "530319487",
    "entityType": "Track",
    "nonce": "0x9897e96f871bd9b9d3635ff44fe567d39f7ba8aca4ab322c210051efcc0216fe",
    "signature": "0x4316a1f8a121e2d0b0954cde4f1a7537aef517d85ae28357a2bd86dbac730c4e7d1868b6dc841abe71ab43241e46a38b69cedead435767a0be453c9eae1fc1461b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}