{
  "manageEntity": {
    "action": "Save",
    "entityId": "258195195",
    "entityType": "Track",
    "nonce": "0x1bc75ce833e2a08de9df4d28d8024721bb491e4f803f75b040c1202eb56ccde2",
    "signature": "0xb9f71bf55ddfbe80783a74d79fbad468973c2066315bf3e120c7c25eca57e90a3d65895be6cd828deb813c53732457f8e300916f22e9927c4b49e1b98073cde61b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}