{
  "manageEntity": {
    "action": "Save",
    "entityId": "2038852228",
    "entityType": "Track",
    "nonce": "0xb1107fe73038d93abc49c646b4c729afda5f8dd948a0d679b700e977c5d2fc71",
    "signature": "0x2c2a147513f0ae943173413c61a8c1e3fdb5aa1bced3544cc1c6c1cee3ad713c352c60f1205380690e8436ed17ca9b8aaab44563b5139d26e4dd1b45709ff7f61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}