{
  "manageEntity": {
    "action": "Save",
    "entityId": "1307126296",
    "entityType": "Track",
    "nonce": "0x27d4e647dd097e28533f90b80ab876561330e5435a461867aa73885051e9b4f2",
    "signature": "0x28bc93cc2e4f8b826e8d760cdd4f1f4c6e21a609449b62bc96f97f9a3d98ee46243381dc33366ef8ca0cb6b205ff7a3c198f2761ea6abbf0128eeee1cfc1694d1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}