{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd26ef89ba754a38eb1e92110615772bba9c8b2ce4c88fa4c192d4a63ba5d99cc",
    "signature": "0xc217542662fa7080a7263ea5a3a4df480dc0f541616b5bdc01edf70fdb716b704501aa747d3660d23ed325f7798ab0559dd37e783da5e057fb07c8ace21499b41b",
    "signer": "0x1886A26Ed7CaF0E0414431EF5EDCCBd4211C42Ec",
    "userId": "187815229"
  }
}