{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "303975",
    "entityType": "Track",
    "nonce": "0x99f0a2d2079a96cb27fc32e27dab078b71f6c19bff33eab6e67856c3ba2dd24f",
    "signature": "0x0d26ff904b8e7dc332ae70d47fac3cf5a347721df36c46d55549c2f120a8915725d63a903bf6789d61d59c37cbc680ee75c5a3c0593bd67ffc680f0a4ec10cd71c",
    "signer": "0x77716b11b242ACc386023E99B7e647CaCCcbb8b6",
    "userId": "126786"
  }
}