{
  "manageEntity": {
    "action": "Save",
    "entityId": "513281233",
    "entityType": "Track",
    "nonce": "0xb1b910a5d99afab4374d316c9bf8fdde245b29faff1b9ec910ab29779fc68a14",
    "signature": "0x1e002120f1f6dcca8aeaa777d21898a7672e1ad7074e5f431da490a3208e71820d47087d312337c94a699330ed8b21ccb5d43a7051b444698aef26c00b95fb601b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}