{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "192889860",
    "entityType": "Track",
    "nonce": "0x8d3e6ae6aa0102b19c7aa969d2e88b83c5d5f495e66a3a28a27477a52b17dbf3",
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    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}