{
  "manageEntity": {
    "action": "Save",
    "entityId": "1555493204",
    "entityType": "Track",
    "nonce": "0x954bae9581830ce1ec1ed21240abc23e1c7ef529ef6979c1b4dbd822ebebca16",
    "signature": "0xad3cde55ec80095b2653a501d84c63c1134d6298b55d0441f9a0dc6c7d254e511b27ff593d3262836ec4a983d1de032dd4d3e6d17769e06f1a6190f3959265cd1c",
    "signer": "0x52F331C086a11941E738a6C86d9F127E934dDEB1",
    "userId": "281470566"
  }
}