{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaaa080e9dd9ce269a09b6bb76ae3cf98fb87f7b0ce02d27fb4570492a846ed80",
    "signature": "0x8b71d12655056fe2d72af16182cf6c7c0ddc036ab841413bff09e5b87ceced443938213a8fa9016dbae10821a12a99924b06ccc4d45142ba0b28dec025900e2b1c",
    "signer": "0x2f7f0e01e38DB161696E302499821B025Ef9b9A2",
    "userId": "858031702"
  }
}