{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1054017547",
    "entityType": "Track",
    "nonce": "0x868988480ebc9cc39c2b22073c3fbca658f026a5cc22d4fe74d2c117e85c57bb",
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    "signer": "0xeB50CcBe2f6fDC265AcDCe776803eE55Bea32738",
    "userId": "121537"
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}