{
  "manageEntity": {
    "action": "Save",
    "entityId": "759393379",
    "entityType": "Track",
    "nonce": "0x2be138d4ad8d46fe24d77fb84dc41e872fef6a19ee391cf44e49de1dbdad01bf",
    "signature": "0xcce530cfcc1e5c3602d13cad0934f988d7ba89dc465c71fd8684bd460bee44e521d6866485b9c2f114585cfdc89692fbcd94cc1ea12afd279c3eb3ecfc5386091c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}