{
"manageEntity": {
"action": "Save",
"entityId": "488392323",
"entityType": "Track",
"nonce": "0x6a5ef44a012e9570bde6ebc17e1439e81cce1fdae3235b29926312018de1f945",
"signature": "0x276dc41f5dd4603d4e6b47e55b98cc5912d5bb554207de5ab1dda9a5febfe24e04e5652a9cdc74b3d8c99bc2b998d86155f96ff090cce998d185d4e138a460af1c",
"signer": "0x44c6c9974E4028ab550E0311F9A04Df023477958",
"userId": "152450"
}
}