{
  "manageEntity": {
    "action": "Save",
    "entityId": "167637507",
    "entityType": "Track",
    "nonce": "0x66c8e443b5fb94d89fac0ce2fd479ad5b39d01d6f59e10d1a4d03be8c74e24a0",
    "signature": "0x5c3abce5241572b54c9fb3d3e3ec313eea46f0239c171ade3ab060a68d4356663a55b507e22f426e41b7b8659eb698b815fd76100c41be8ab839cdadaaa25f991c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}