{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "489479007",
    "entityType": "Track",
    "nonce": "0xc0bd3f464262c5c52a439f0ad3378628d7c958359a2af529bca09c9467463787",
    "signature": "0x037307e329848698315674cd86fec038fd6d2b4c525bca686cefa47a075940b13375dc016e8312a99baf0057d2c7ab6493459e09299ecd14dc781fd418bc2efc1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}