{
  "manageEntity": {
    "action": "Save",
    "entityId": "1588827868",
    "entityType": "Track",
    "nonce": "0x66b7ecd639da42cd894830c82ffce733c0eb253b99afe84edc4ed915e072a3b4",
    "signature": "0x62fbf8ed68096a951b2f1f574dab8a428a4ba4fd61f792cce4338c763409c9c345bce7f51414a9b77c9b622cb02278b6fd417f2fc541a53444ac69c8dc09f8e51b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}