{
  "manageEntity": {
    "action": "Save",
    "entityId": "1016953460",
    "entityType": "Track",
    "nonce": "0xc92b11b6fe72fe9730cf5c52b4a1748eb54d2da61356804f1ff4669dc71b3a75",
    "signature": "0xa4b53970761bbbf26ae50cd70c3c2b320d1dcaf35ea095d7aa08169883e5a0fa7a21c02cade8debad693a1154b14c0b31328a46771df432be90148486478772c1b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}