{
  "manageEntity": {
    "action": "Save",
    "entityId": "929576463",
    "entityType": "Track",
    "nonce": "0x69d4f96afb4f0211d25b2185ef31ccc20d33059594c45c950ed4c06a4895368a",
    "signature": "0x33ddfb380e4b37e3699a18e4c8de41063e8348d812393c7789fe9120dc4400724ecc502b33f50cf0a4f2240a47cdf95c01fd1f291a078a88a588aa4217ad9df21b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}