{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "487908",
    "entityType": "Track",
    "nonce": "0x9e0434b45da8b7fd9ff3e584542f4c0670851ae850a6af5a3cda52fa9d915edc",
    "signature": "0x2ee2d0c5f56322b8bb1a7618baa5fe1be9de4c0638fbb6fd97c801117f95fa0c799c46f61c6e3a39b3dbc4a76d53340a20546b4602e0b99cc37b8936121d9e8c1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}