{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xee66b1579b107bfa5b3dbd69f019ae77938eef57d887f90aa59b292057e0951a",
    "signature": "0x3c9acc6eefc9b13a5391f407fe481294113673b11cd08ac5c67913a05f38176646c9e54025214210746e94ace4f1b8c5745bdf21ae6fec4fcb163791ed48817d1b",
    "signer": "0x74fbDf9CC0828977855E95524bCf5982d148827A",
    "userId": "579570300"
  }
}