{
  "manageEntity": {
    "action": "Save",
    "entityId": "52664329",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1bc6dbdb8e655a7a976dbd54742e48198e94271abbaaa5f6e839d80930eb88e6",
    "signature": "0x7e967946ccdd498427c2c3d1a282107c0751a360b120d8e4d18dbadbba40c89a77426658ec88d96fea7fa868fa596ba2ed77c23c93c72db5ef51ac622da0676d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}