{
  "manageEntity": {
    "action": "Save",
    "entityId": "1993786097",
    "entityType": "Track",
    "nonce": "0x2a73660fb610782686e3f9eea119b8f80b8f23f2524971fb99b0df1f993f9ff4",
    "signature": "0x7408ff1bd95f4499f7e903fe4acd41ef13bc6bbe5e4d63b7843e98c05d98cde353c468c5481786ee0d9ff4c3610c8e15309827a3d005d0ea34cc3bbf6e9107031c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}