{
  "manageEntity": {
    "action": "Save",
    "entityId": "1876089545",
    "entityType": "Track",
    "nonce": "0xe6356cdc5720d0ae760bb5be09efb4838e711cbf57dd63aad4bcec02f9ec17a6",
    "signature": "0x02492c259d65a658943abd74bde584075a9ac5115536e2ff8a34227f444044f856cbc9b8260ad2920365aa010cd72597c970d6787d9cc37aab2ea7f96bd86c2d1b",
    "signer": "0x833c8592D0cc72Fd7c3772b3f8ca8044A4780a77",
    "userId": "393889489"
  }
}