{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8c95d400aa451ec7223314c2a44a1aac45d09652c4d740d047217c37ae2b94f3",
    "signature": "0xe96a9575e2c6d72e15d45f7c38736d884086af6b9d0b66adb3cd75309140ae80275cca418384801cb5be64cfa1071a06401d79bd28c8d98f0c37adb1c936d1d11c",
    "signer": "0xb1202aa99a03fF5938602E50F754d4E044689cB2",
    "userId": "975349976"
  }
}