{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "988516",
    "entityType": "Track",
    "nonce": "0x91d66c715bc3fc5f184a92c3cde753b3dd207f9ee39623c069bbb5208a60f471",
    "signature": "0xc317505a1e178c32b5e4d4d5a5f2d6270a177fea5f21ba908d7fe10905c47c3e6dacadd336f235f0892242fa8ed1a90cd1fa86975b3ac869094e6bb97d7e32591b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}