{
  "manageEntity": {
    "action": "Save",
    "entityId": "573227133",
    "entityType": "Track",
    "nonce": "0x52931b10c6105cdee2d7d18418cdb3b95fefb0f30822beaf25e362957c9d3f78",
    "signature": "0x4b82eeea3fd24cd3ba04310910121c6613a46c2383b9fb118df44106b4360b8c6708a1794786c00d22ea653f66369b64633672a6efafb9bb6f6173817cc399131b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}