{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "350483691",
    "entityType": "Track",
    "nonce": "0x0ab3dcd729242742b42f85bb91a4af51eeb24119e3a3dca322506160a5fd0154",
    "signature": "0x1a38b4f2ebaa5da5ce333d4a4abb88a81989879c0e44e0567a8a7f43e81fbdf2239e997ccec5d132249250afd9d3182f50a8f379d562e222a070027830b283401b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}