{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "457575682",
    "entityType": "Track",
    "nonce": "0x911e6fb69fa2a84a8f34777cbe74003181b64b84c7a794020214f5fccac591a7",
    "signature": "0x478d6e6debd49d2e23dc4dee1eb28cb861d7c692987245e5138b7e2af695fef864ee1771fa7cef52f18d7db8d102933ef92e4547499e18ce45e0518d5343b1261c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}