{
"manageEntity": {
"action": "Save",
"entityId": "503940915",
"entityType": "Track",
"nonce": "0x6894c7270951998e51c2947a165524804efc6533de2556640bfb06b6f1be8938",
"signature": "0xfb46dac5ebdca2ff448f0885a7ff837bd05b5a3b27e957a64f801afb74b9e65443c41fcb12ab695cfb83e05162ef21956ca80404b943948dd81d99089af83dcd1c",
"signer": "0xdCaacd15eeC96768B2eB038bc28907c49f988312",
"userId": "836022655"
}
}