{
"manageEntity": {
"action": "Save",
"entityId": "1858774638",
"entityType": "Track",
"nonce": "0x63f9721703f17b0bc03704fdcb8a3aa4976eb680efb99947a938ea90ff77f8f4",
"signature": "0x253546286d2953dc7e6546391dbb41415b0ff8397bae9f4276ad618acb9d38541013df591e3931775d62cff39ac8d3d9c70906bfca87763b645d5ca12aa342581b",
"signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
"userId": "989073793"
}
}