{
  "manageEntity": {
    "action": "Save",
    "entityId": "556022253",
    "entityType": "Track",
    "nonce": "1792615019159092648",
    "signature": "0x31c2d4079c6883c5435b81736605c0b16f13d9eccc71b7ac7ecdef0c5a451dbe140dbb85cd6ba7f5ed6e542f6b665dc0b4c42c2c3187c99f85fa6718e0a939351c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}