{
"manageEntity": {
"action": "Save",
"entityId": "202796922",
"entityType": "Track",
"nonce": "0x7b83a4a4a1730a8d260f57bab3168b8e261e8bf7a2f60f1f99f59f3c4342f54d",
"signature": "0xade1945acc3ac51023e66bf44ebfccdab97907d5bd0365fbe3b57e52c68b0e3057b6675a8cb868ff68e05b1201a17c78a511af2e36acfd9102555c9463040f221b",
"signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
"userId": "490478463"
}
}