{
  "manageEntity": {
    "action": "Save",
    "entityId": "1419426805",
    "entityType": "Track",
    "nonce": "0x6c01cafd72c8d8f0598c847c0a0a91855fba69e23dc8f761e79e52c99ebbec31",
    "signature": "0x5a69f5eb024c7e0d38d6dc6469e6c00a81a84f64783cc4ab4d385b1e001ee16225ec302f489ca233bd43fef9f65c40b955ab2696791b991bf690ab52f1caaf461c",
    "signer": "0xaFdEC27229de1023f5322f4Dbf0e874dC548011F",
    "userId": "817564020"
  }
}