{
  "manageEntity": {
    "action": "Save",
    "entityId": "199423919",
    "entityType": "Track",
    "nonce": "0xc8a132c9218724d4c2dc2c580f0d23b5333372e8323fc4a0c831c9a103663e41",
    "signature": "0xf4090092f9407ab891f615a7be711e3aeef72c4f368958a2032b75333047eb1372b42cd49b27866be4ba4630985612c0ff7264827fac44169b4814aa0845c0441c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}