{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "891165667",
    "entityType": "Track",
    "nonce": "0x66e5cfeab5c8723c1d7891ce9b6533cdc831b1a6210c00131f12932c0c2313d9",
    "signature": "0x40c620c50284908af9dc9933334dc4d99ff6727161306e757fe7597c19518ec30fdc619256ef6d753d2ebb9e21529b21f204963c8cd5395de522b4aa5875500f1b",
    "signer": "0x775bA7FB8a4FF9354c099465ca493BA949FdAca6",
    "userId": "597677270"
  }
}