{
  "manageEntity": {
    "action": "Save",
    "entityId": "1998956844",
    "entityType": "Track",
    "nonce": "0x2ccd004e807585739a25f27376141c8ca3d4c8ba503fde48734604aa85663bbe",
    "signature": "0x52604000302e282335baa7ea41440773841e6905dc462a39c1411845a8eec08c744f4b3ca6b6b79a4e98a545206fda32bdffbe412442dee8c80e78ecc0d321591c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}