{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf38113d5c11077c4aad6e8b964bde55168155a8d672e44ae0975ababde0032cd",
    "signature": "0x43f8eb5ad37158afbb17e9076a139c72fa070d248377743fe6d9be0d7a2d11c940f0b99a44f77b6f2559c06d121f3d3359abefdb722bffa9d2e40f6982126e3e1c",
    "signer": "0xD5CFA3876DF32ADb15BF9B7B3A24bF13e2F81Db4",
    "userId": "363174156"
  }
}