{
  "manageEntity": {
    "action": "Save",
    "entityId": "1775923458",
    "entityType": "Track",
    "nonce": "1792367501657052822",
    "signature": "0xd93af07e0f2564334b59d995fca08dc8ffca8bccd7555dcb7474b1432d914bf832ab418ff8484252219a2dc2cdd9e96d94ae6e30ac513737089271ae443f82c11c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}