{
  "manageEntity": {
    "action": "Save",
    "entityId": "1765696707",
    "entityType": "Track",
    "nonce": "0x9a9f7f7a31d3e700b4683f12d609fe46cda18d3fe77cf859c1a3310a47a38786",
    "signature": "0xf846b9f033000a53a3c218faa2f1ac8dacfd0de02855be46cc251fe54a71351a05f4bbb923e9291410ab84e3f4a7627b665787d6271b25054dd3ece11c77b5a11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}