{
  "manageEntity": {
    "action": "Save",
    "entityId": "2134066641",
    "entityType": "Track",
    "nonce": "0x849cff885688445ee8a189c9acfba711cc585d4d870001033177a69b4498beb7",
    "signature": "0x8ebc46c1213a9defd2dd75c233f510241112e03902eca54deb3fbd6b70685a367f6e648abae5b98c86dc7fb1a74d1f0e62c8f3117ca488a0b1ec0dedbcbb3ba61c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}