{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "618046",
    "entityType": "Track",
    "nonce": "0xa64fef4d5cfe6dafffce36f1495cf9a2b392d79f43f2b9313378f77902b8b12e",
    "signature": "0x23c677f533ab7eed2b352b00821fcd578d8f949824e153a8be46fc2111821f141a8bc4a046cc8ddfc5538b83c69439bfe4cfb24e40dbe3a1c7ff02fbb1ff36d31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}