{
  "manageEntity": {
    "action": "Save",
    "entityId": "988941665",
    "entityType": "Track",
    "nonce": "1792341036383453024",
    "signature": "0x48a3396a29ce8182ec584567a36a3e53147ab453c521be29b5c6ed1e082942df4218abb443c347664fd0deb18c3d8422755d14ab1eab6469585cacda35b3fc111b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}