{
  "manageEntity": {
    "action": "Save",
    "entityId": "1988058504",
    "entityType": "Track",
    "nonce": "1793797029291411948",
    "signature": "0xd2f40f3b925e51d98f1c8d9feb7804bf6a2678d381ad6ffb4ac31a91ed2d903936797f979b0383a2511fef183582a509812fcc14398a326b0db1be9e287fbdee1c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}