{
  "manageEntity": {
    "action": "Save",
    "entityId": "1885504053",
    "entityType": "Track",
    "nonce": "0x8f9ce9f33be513694553c9d5c68cf518db395f23bc97382bf430389847627a39",
    "signature": "0x92904271347b884397d5cd28032603ff338f1cf7851d88ebdeb73a186abe48d9315a22481a67d991e7482289f739156cf279f4ab755e12ee98038e12f4f82d6d1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}