{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1850039858",
    "entityType": "Track",
    "nonce": "0x80d6efa65efada0887afd000f31828ebdc98dce1a1c1141adbc647d14c317d91",
    "signature": "0x3cbd3e63836adac970051b5f903189d86aa01776ef4adb7899b4906668cf2b3f4ee606a2da18ac9cf3df82d5c44224123281896a16f32f695216931e382840f71c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}