{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "410813",
    "entityType": "Track",
    "nonce": "0xcecbf7d3ce451e1650e519e57249988e0b97c94328e33a91f2035c3d1c5f6c9e",
    "signature": "0x25f98ae2acf77c314a99f72baafa352b5fbc7273c2a78b708e01b6ef9b31e8d6082c86eaaac0b31b698a55e51c85dd1519d03e610bba2fcbd4ae9e48055f829b1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}