{
"manageEntity": {
"action": "Save",
"entityId": "48145112",
"entityType": "Track",
"nonce": "0x845180b0dd51e6098a5989896f9e853b0cb20b4409fbd19b54df45f18fe29dbf",
"signature": "0x33e889471d9cd2b86be62f20c1713a010add768f5fbb6b03a6616eceb9a1b4d825d5b9af705b1a2331b7108d2fb72cfe4d344c47b95295d54a9f1772a7308bdc1c",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}