{
  "manageEntity": {
    "action": "Save",
    "entityId": "583020760",
    "entityType": "Track",
    "nonce": "0x3294c60c7a63a79f2f4a9997d1f6f28e483dc4959acd4c93eb6c072da170ace5",
    "signature": "0x0a738db490c1b7e5b67e4085777ddf0e2d0b30f827053716b295e5b58c013467127bcd75eb3b08630f888ab7f6fc0ae9e2685d7f3c340828eeeb891f4ba995261c",
    "signer": "0xC041f26f283EAf5F5C78Ab3694f6517cd2d3a1F7",
    "userId": "93075"
  }
}