{
  "manageEntity": {
    "action": "Save",
    "entityId": "949549851",
    "entityType": "Track",
    "nonce": "0x22f3ec94fea926348a1a564cac859a0c0df46085aa3b0fc5b9c8b2dcef7ed506",
    "signature": "0x349aff1a7c9213926b7bbbb9b59515b714ef6a18967590e3bd81229ebaf42c2736f4bd006a616d0312f39cdbda9d159a40d1ca043176af532edab2f0d545268e1b",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}