{
  "manageEntity": {
    "action": "Save",
    "entityId": "1590716277",
    "entityType": "Track",
    "nonce": "0x8b56d90c9ffb6f7cbab7e9636f68d1a9920e6df4c8d9eabf63040acf836f19c0",
    "signature": "0x01464f664eeb3b99235c6cf3386fc27b7a43312253ccf701532f883b9b0c5d7f382bfe1147862cca09cffca9b060228bed9f656d2b08ff755115d966780a08761c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}