{
  "manageEntity": {
    "action": "Save",
    "entityId": "336242",
    "entityType": "Track",
    "nonce": "0xe786249ae4c6b97eb8d88a3058bc7fd108a073b1c294b25784dd42475afaccbf",
    "signature": "0x4f9667ff257dcb6b1e08b1b5a831a491ccf5a068ad4b6e765793abdee6afd808618e600b749a04664dae032715ae8ef6e73fe5e39e639a4a3bbd3f4b4d4610c41b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}