{
  "manageEntity": {
    "action": "Save",
    "entityId": "326802186",
    "entityType": "Track",
    "nonce": "0x4d006147e432b5306017202109b1f20f55826fca59031205cabbf37a3b12d9a0",
    "signature": "0x2ee3f5bbe7afb3a7fb1ad6fa20ac74dd690ea4256a6e6728d4f9ed2f51753aff7b5a2bbaeed0bbd3142e722ae2b74eab389ffcc92e098fcff0ee10d7a9b999d11b",
    "signer": "0x58EeE406DB0683Db4101A97aee427Da7951e499d",
    "userId": "147070911"
  }
}