{
  "manageEntity": {
    "action": "Save",
    "entityId": "966734491",
    "entityType": "Track",
    "nonce": "0x9d4a599f89ac10091972656f35fae85d26c48f3f0d19e520eda6648e826302c2",
    "signature": "0x1988a2e7d3bb0880752a9a81d463ebaa540ed8c86840d196a19573f02ac8cb9c7b9bb57358e9eb619080f35bafe2cc68808cacf8a587bbbf47db314cd4bdd9c31c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}