{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "490175857",
    "entityType": "Track",
    "nonce": "0x68ec6d9ba0a60a8aefb93f12c1b11e354b4b888aa96333b995952e20fa11ec06",
    "signature": "0x048755777a3084c6254514e70887f0d2de205b5fdd847ecb17917a870ad6c7895e14c1a8d9a253d63fb5ed9d2a69c60043d32d04c4e1bb3e98199a943a2dac711b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}