{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x68832ec2d6bea8116ca77659a7872a2fc17408cdcb7f22f5beb9b125c9a15549",
    "signature": "0xa15116c527e28499d27348b62bf98f969754103ca80b6b8edbca232696876d2e17ac91e2c1159b81664e5b1e03e4c07e9d5687b6dc7b08b60c223f436f35b0101c",
    "signer": "0x2b2d3D0D8aAaDE4188b059ebcC3C79bb5a1D5a5b",
    "userId": "747318526"
  }
}