{
  "manageEntity": {
    "action": "Save",
    "entityId": "1079588766",
    "entityType": "Track",
    "nonce": "0x649a0ed26ace50debe71328d47779f5f46beee245911715bfbe9bb3d4a6fbe3d",
    "signature": "0x8cd45cba4d827d490741f4a5827b8e1044b879935d0af6ce515489a5640916f306e862249ae10f7b313b470a5b8fbfaf9c1513b9430dce955e03af6ffcae9f991c",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}