{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "878499597",
    "entityType": "Track",
    "nonce": "0xd581b27d5355105009f9c796ddbd994d2a8259ddd1cc1bb3c798827dd118462b",
    "signature": "0x4a3fde5f0be2b5131a3eecbefff62c6aebfe245d80358d9dddcc715c51f6001f08e3ba99fbe0c99fe482b77f68fe817cec925ed91e64322bd16b42d305cbec7b1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}