{
  "manageEntity": {
    "action": "Save",
    "entityId": "292487929",
    "entityType": "Track",
    "nonce": "0xa50cb894645ca9cbfe9992e4068f5e98985b345155e85029bb145deefb5f4c00",
    "signature": "0x88326e1f12e933acd4225f48f67af747633133b38489201b02e2e66d8ebfc5b160de1abfbf003ad14784ad08bde9157c44306eb54996ec0e34665702a77c008e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}