{
  "manageEntity": {
    "action": "Save",
    "entityId": "765898",
    "entityType": "Track",
    "nonce": "0x85fd911ab9303e2c08b73f1f37569b5ae5d75165323943f768a5ff7097292186",
    "signature": "0xc039b49f719ba4360f6ceee10e067c0aeff3485e33713e390810b4afaf0e7f3424f79d89881d5cd4a8e036161e7342fa4008b19b8905adab1eb394ad25f2af651b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}