{
  "manageEntity": {
    "action": "Save",
    "entityId": "1539252864",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9c5f18a65f8fc0233a034e2454e0efb5828a8fc5701a1c55856daa484002ffc2",
    "signature": "0x418c7ded6a78b4d607287df902410daac3dcbb6986eb3c8adf9d83a9f83e937b61f49caf1b45336e171dc4b8faa4e4edf6d31de30dc6a3c5c4a02caf06cce4f81c",
    "signer": "0x9c0E158fd6a79ba8384938c72F34b5D765d2A9Df",
    "userId": "178678516"
  }
}