{
  "manageEntity": {
    "action": "Save",
    "entityId": "148927618",
    "entityType": "Track",
    "nonce": "0x84e9ba4df9fa75ed6d7c0a01808c61e8ae626d38f1eea7b5f506d373a6081055",
    "signature": "0x0cfb296d137ae5d6633e9c25361ede710698041acc97fe7f2b160f95ddb39e1f63de3173ac83dc5a42fbf8f2ebcc98812cd36b9871b08db87ba4b231e571bf201b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}