{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9790432bc97e61cf31af810231a8e9d5d1f296651741a2f14de44f43735b8ae6",
    "signature": "0xd6b0508e98af06f0b81302e1b78aa29d51027475ffece6896eb84dbff2d7919e2ccbe1e3156271fe00f0d32b05804a8f8f590c83d8d25ee4750df4b9cab78c071b",
    "signer": "0xE87810AdBeb88cee1a26E56469873118eBb15658",
    "userId": "206235141"
  }
}