{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "974341129",
    "entityType": "Track",
    "nonce": "0x552d0ccacfd12cc78f0acb7e05837da57875ce8413af35b5a5ea66515328ef15",
    "signature": "0x3e4d3122f1c86b0586b55ffea27252547c7bb9f44a28d2071aa2aefd8b4bd878342ecbe726ece5cf700230d0e062a345322d5b672f180fc09613ff9c988ae0461c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}