{
"manageEntity": {
"action": "Save",
"entityId": "381003048",
"entityType": "Track",
"nonce": "0xea1a421daf8b594d574c6766f551cae81510fa7e4ad2b17fb7208dd2adc4e4a5",
"signature": "0x1290dfc7c1955c157388a3a806e32ee995897c58cda86d50afc38040146d16ba48e8c38cd4794b0a1871b70e6fc8888d00f37bb9b0f033a3c10be130d23859191b",
"signer": "0xaFdEC27229de1023f5322f4Dbf0e874dC548011F",
"userId": "817564020"
}
}