{
"manageEntity": {
"action": "Save",
"entityId": "1257645695",
"entityType": "Track",
"nonce": "0x57edb7516205dc793f7166a08a0b049ec2fdf9f4605ab33d92b131bab76e15a8",
"signature": "0xf2b0beb6d89b710f6edc965655729ce937da5c87d4b86dcea6752ca98a9e8392061443e31fca8d73b8a0220c3a8df557379dd3f96ea6c4059e00b2c392ab97ed1b",
"signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
"userId": "128172"
}
}