{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "572999",
    "entityType": "Track",
    "nonce": "0xbdd19486195a5aaf171f8f59db90994d4b1c3ebbf531a1f43679a265b8a20ca3",
    "signature": "0x581054fc905c3965fcaf9c1625b614d2bdca88bd79d54ea9f58f1fbb9951e8477a02be74a587eacf041b45cadddebcae4693d68b7511b00e90edb87636363d2c1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}