{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x93a4c8fd5f8b995baaa49ed4597fc909fe2ef227c7e0da18a8084d1a4aa07b3d",
    "signature": "0x44c1a6f37619e8361c091acd242a1cd97446661c34f535fa514bcb524bc4d30047c921531c30fb94a320bc260d308b2e893c342bff34cd3541a016ac69e1f5e71c",
    "signer": "0x7B499405130cFEFBBaec9980A9E37BBE42E8589D",
    "userId": "633494619"
  }
}