{
  "manageEntity": {
    "action": "Save",
    "entityId": "572179046",
    "entityType": "Track",
    "nonce": "0xb001b29e4a59554573b6826d558154359b42559b15885c25259a8da494bfe5ec",
    "signature": "0xd1f6a647c185f725a5f9eef20a79abf5671c174e87831deb51c596abac556f695f453ba9c808507aca91c41be4365c88450599924f7b40e54cd2a2b4c52e7b371b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}