{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3b817ea97b828cb2a40cff7e488467e979b0a8a858fc11e3b1fe35b6192307e7",
    "signature": "0x5ce55f1bda3fab29c4414f967b76293c9037582d6dbfa8afabf9f9a99cbe3445445871a5228be3e595fceda45c34d149d91c44670bca15b0f535a8dd5323da6a1c",
    "signer": "0xEbC06f3EE2a7773B0D3A79e03cD6F88863a052De",
    "userId": "738005906"
  }
}