{
  "manageEntity": {
    "action": "Save",
    "entityId": "102978239",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb4c96614598e15b0bc95b90ce9eff9aeb72abb09f716f9fc08b9fb6d46b22530",
    "signature": "0x49dc7bf7820ee4a138c016bbdc0556ba58821fb6644c577b37849c6ef5ebe10f6f404d27c24d7d46a16a9f21588a18060e5ff8ef983acf462812a13a8e4580ca1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}