{
  "manageEntity": {
    "action": "Save",
    "entityId": "212896575",
    "entityType": "Track",
    "nonce": "0xf56d98567d7e36e7032af0bdbff8c259b8e3a02733528361ac820f98a3735405",
    "signature": "0x331978eaded9560efecae4b702970576e1d4bf28ad377cae7e770d5f8fe64d1c2f7fdda611b1b323d6030ab5d197b7b6fca3f434fae3345363524d75235496af1b",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}