{
  "manageEntity": {
    "action": "Save",
    "entityId": "567018779",
    "entityType": "Track",
    "nonce": "0x26eb779e80d9fc428cfb9a50bd4d562a3b1eb96543efc7d247a5c3aa8140c532",
    "signature": "0xab340cda574208b9ac69fc228aef1511811100ba267391115d4729f02b393dba5f4aaabef68636927ad8e167586f6882a7c722db73d568caafd259bb6c6695631c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}