{
  "manageEntity": {
    "action": "Save",
    "entityId": "1709189616",
    "entityType": "Track",
    "nonce": "0x55516d4727dde3732020d7a6b34b45b6017529fbeffff6ca1675d4365f5094aa",
    "signature": "0x3b0e5c9da1245b22de7c2bccba926e87f7a9e15a29b9548aaec747b5186e73c0204570789c1b5aaea525584b8e3a1f94979319a15889a821eb5bbf6b1198e5631b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}