{
  "manageEntity": {
    "action": "Save",
    "entityId": "12229",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x02341a34ee097b5360d1b9bfb34c476ef74fba93a02e108fc707f3f2a4e7abf4",
    "signature": "0x8f892017af200ecaf9bd99956c86510b267a61fdf2732742d61671131a355d8439f019509cb2ad195b33bc4c0935006fbc6e4eda2e15735935551eb0575cb10c1c",
    "signer": "0x78bDC2F059DaA68F1424A1539Ce38d5C83d8DD4c",
    "userId": "4686"
  }
}