{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf17b254e52373a55f81b83614a32a807fdd5bb30966d0e9704dab1c71c29e2e5",
    "signature": "0x32dbd59bddf0037e671d145f19498f667a811ab095c9d1ef81c146a5c141aa550e315210ad0ae045db99dc45572a38c34575bb3030abce489b3a51f30f2889c41c",
    "signer": "0x07c1d288155AE8d621b4a6070b08D05871DcF832",
    "userId": "108910126"
  }
}