{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "740389437",
    "entityType": "Track",
    "nonce": "0x0df804104a35645e2131fa8b8c933327683157a99fff75d13871aaa491b81583",
    "signature": "0x950bd50a8eedc2ac7e1ddc21e452102ae577b1ffb29563c2b1abae82e21379304475e84ca1eaac3a1eba1e4eb0e6ffd775005c949bf09b76ad7a53c8e005bd6c1c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}