{
  "manageEntity": {
    "action": "Save",
    "entityId": "541794",
    "entityType": "Track",
    "nonce": "0x792fa6994f61ef3297125fa9ea71ebff6419a80a1875b99fd1f9d96d3097cf1e",
    "signature": "0xaccf4a55adc1726871426df0da05449b29aebf2219e0505078348fff4bd280240f345f9d14f752f80e668588b9327be9312a64c91419b48816aaa759775555481b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}