{
"manageEntity": {
"action": "Save",
"entityId": "2141133735",
"entityType": "Track",
"nonce": "0x783d1200eddb6c4cc6b7372d7355fc5b5c93d14b2acb17c8e360a0defec4128e",
"signature": "0x65bfdad75246e92691f1f4d5300eeff2c32fe3559129e137b3d6633dbfabfcd6416e92a763e9f0ecb0878e0e7f8620207721a6a8e2b8b799c04afce4461be3021b",
"signer": "0x766d742Cc35188990Dc38CaD8006DEcEe3fAFed5",
"userId": "353834"
}
}