{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "516046",
    "entityType": "Track",
    "nonce": "0x39a89bf5ccf29dff7aa1ce9a8ff3bea55976e89d1928caba1ee4415e456fbb2c",
    "signature": "0x8ec8806c934d7a6cde12f659571d81461ad563c6c63d0a8fd925f6a46cc2e4b27f94ac31b29e4ad2ec339845c9522f8624e1cecdc3091b452b2866bc985658351b",
    "signer": "0xeB50CcBe2f6fDC265AcDCe776803eE55Bea32738",
    "userId": "121537"
  }
}