{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777145444",
    "entityType": "Track",
    "nonce": "1792312675854736636",
    "signature": "0xbb7eea72a5a861f86916b4350550a4a66bea9bd26b47d1f36e3c76f1ea322b9b053b9c4d9c8da7314438dd8fee6a7575a188196f563743b91bf1f4c9881781161c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}