{
"manageEntity": {
"action": "Save",
"entityId": "1644698402",
"entityType": "Track",
"nonce": "0x03ab63177e88cd4f99e219a9a13cdb9dfc5492d578bf9b963485c47c5980cad7",
"signature": "0x1aa4097ba0039dee79a4b03c3037e64535c82fcb129a78d506718b74e8209473148b40881777fbd62762514ae0bf9a44d53dedbe30d81c63b4b75f62fe7749891c",
"signer": "0xe5438A08048A3A712bAD9e7882867157630CC4FF",
"userId": "810146956"
}
}