{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0f13b15e9da1d5076e64617d857e20c01001649246cbe9f51d5f331d9e0ef4ee",
    "signature": "0x627596c6273c8e61d84f833de269b46575fa5fee6890b2a1de736720020cc0f649660881e0f58dff4ec68cf4cfc7e67703688ccbdd1e1b5587ca2a4bc858bfe51c",
    "signer": "0x4a3251b59afFa652DE3CD1C6fACAF517bC97c9A8",
    "userId": "321193209"
  }
}