{
"manageEntity": {
"action": "Save",
"entityId": "299119735",
"entityType": "Track",
"nonce": "0x2e38cd97b030652bc9334f4545264aeb0e831ce41bcaf5622278c32ab48bebff",
"signature": "0xc2f0b4e95393e94ac46f2dd8f4747285102149cb15976ac54422ab3a6707d2c80a8d6143862b819b834a4824202789d9dbb4d00785e57fbc664d8fa2d23339241c",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}