{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x96e22899ce97d30d03155cf585543c95f3735b3db2a4f262aa58ec6d79d37b83",
    "signature": "0xabaa35573fe9a313f6a3d8fa6b34b09fe631e729b303cdba9d73addee59d442431a447507ce075cc450270630805ce3472d9255ce58949d8688e4df22048666e1b",
    "signer": "0x16180b98Ee6A1b48f7a45d606AC6B1897005f3a5",
    "userId": "547790908"
  }
}