{
  "manageEntity": {
    "action": "Save",
    "entityId": "1970927359",
    "entityType": "Track",
    "nonce": "0x6efb2aa04710bdcaf8eb1ffafdecca0027e602be5a0052bf8b073ea6b8f622c4",
    "signature": "0xe6ff739567f1a3abf8c2450fa743b7c46c27aa0ea45ca26b20f2869eb4db3d577d7a9e7285d1beb1b088748399d2e09bcf24f6606b40bfbf61ee9bea6d0961111c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}