{
  "manageEntity": {
    "action": "Save",
    "entityId": "1559054312",
    "entityType": "Track",
    "nonce": "1790750566474325125",
    "signature": "0x0ad27eaeab0569351039a74504bb98d44320078171307359aa5b89874417deac0ec641fdd67666abeab996a654059c7292ac7e11ee6551b6dde318998204572f1b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}