{
"manageEntity": {
"action": "Save",
"entityId": "52371239",
"entityType": "Track",
"nonce": "0x4256e7afb942079e623fe3e5d2ecb47b5ea109f04feae0b100ed68ea4568b29e",
"signature": "0xd4a2ec4ba95a25b9cc8bca91a9d191e63316813120b436f71976b4f9f52fbc316f6371e9feb0172bf4147dd505bc945cf3e6c5e0a1fc0b7efd6c87fb73ff92f01c",
"signer": "0xB57F94Ef9a26d73E8b35D3f37FccD18BcC7eeE00",
"userId": "850416615"
}
}