{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc165d242d1766f2922339a4d0801c0c032b93edd7188ed0aac20647409b3fd55",
    "signature": "0xbee190dfdd16d5ce661126bae567bbe3c353af6fb8e884e192c1770797413ae349fd5729874ff4b01707c439d683c82955054c2ed9ef7b15a616e0c5920f8c601b",
    "signer": "0x92bD759747e7E75277bF2F662f6E78D68aA0aDa8",
    "userId": "532298728"
  }
}