{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x608629a41387aca6586901ed56b86eecd8548966f728b9c56e70d4c26783d3d8",
    "signature": "0x7dc731e550c8f06c60f9a2073465ffb9d29d0452787c695de73dc9fd514d142976056cc7d750221932908cbafa7eb6a14547bfaa67e1d6bde137dfa020fffee81b",
    "signer": "0xd20FBbd7D886dc182736160d19691c0f8324E9Ce",
    "userId": "158892902"
  }
}