{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x62ac3c9d19a7fad3a6dbee63c0a431bc2bb0e3b309f2fa938f6e93c366477a46",
    "signature": "0x2e3068901ea2cff4ccdc0d396298fac89e0609772a05e38f31816be90f5d09a65d45d470cf881204781bc8cda2d7f8bcb44486c0a721fd13b28ded9f8e0d2f801c",
    "signer": "0x4b1189bC8Aee2eb6CeD0578e2f69157Ae9DeC090",
    "userId": "67696412"
  }
}