{
  "manageEntity": {
    "action": "Save",
    "entityId": "1250652708",
    "entityType": "Track",
    "nonce": "1792391500899082379",
    "signature": "0x510bc640787d23e768ee1c0c6a5d9b09a16d8ef4a7a7a3bb1f110d561dd906635a7ba7910254cae6fbfc92f8445a03f9a89703810bd6371ee9e0731ed7dd1d0a1c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}