{
  "manageEntity": {
    "action": "Save",
    "entityId": "2119212222",
    "entityType": "Track",
    "nonce": "0xc7f6d3cee6a3ed64ff8e4d0ee6915a36aa319bb8488c24d979a9b5d5d17a4458",
    "signature": "0x398e06f5eb98b4ab0d4f0522e16f06695b998def701487d7d33750c4735adb0d073a467c8f2d25935c574399c31de0213d952750408ca3a7356793a92249e9dc1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}