{
  "manageEntity": {
    "action": "Save",
    "entityId": "725041924",
    "entityType": "Track",
    "nonce": "0x95845497013f117f95c4ef3cac07688f6f1ae5cf586a76ae030d412b66c29b5e",
    "signature": "0xe9deefaa216c67fe661d9fb5fd022bf30515ef0a45e62ffed88abb86dee57ba43a4ee43d4f8ab625e6e31f9f74537ad18fcd49ce1dfafb2ed0794cfe24c5bda71c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}