{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x02611ac9eda721a25bf9024dbcc050bac341c3af5cf37caf78c7ca80fd2e1f81",
    "signature": "0xb482bb7880c382789c8f6554d78adc41ca735be42bacd860a0a05b6a819d17784487e4a9805c2d6548c0cdb75849b6b0e13e86ea38f42f2cf63b483eead4129a1c",
    "signer": "0xd6B54c8Ae60b61347E891451334679DD1B3E373e",
    "userId": "504702805"
  }
}