{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2ed09796c003a97eaa3c15ab43aac519de9b566acbedae223f41aabccca9a7e5",
    "signature": "0x01a40c08436b4d91cad8a9462320d04871d038ff4414be47e858fd7fc4f37f3e5b4584d91f55bde89c377657aece16fb48ad51ade52c1cbc23e0c96404fd38991c",
    "signer": "0x0E7E3C9fa1e51D3CE85cF3f6d99BEC90Ee80a115",
    "userId": "965467562"
  }
}