{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x062928a8d1b114a4d96a0a10e464b98b14c7b10f85ae184be8532440eabf5c61",
    "signature": "0x2ce80e86380db9b730f09ad892a400de62558f9e609c16dde927e0fba0344a3d3202a81d8bd1601f6c3619e58b01b6417a597e82b443de3d68209f817e96a5651b",
    "signer": "0xe6a53Ca37D739E3ba1b0794353D018D0FDe60BA1",
    "userId": "941395258"
  }
}