{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249823962",
    "entityType": "Track",
    "nonce": "1790045697519655924",
    "signature": "0xa8f488e2e51bea1d0865824a2bba7a8ce40b1d65085752731e5e23286a9fe05f24d961cf871751f481ea21274284ae76b416d9b030bfda5c094e43baab2bf46c1c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}