{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xedd2cbabfe33c2cb99604012635aae6c49b44510caf92fd723388119e995746d",
    "signature": "0xb94ef0dfa3cd660fd381c8c2da44f4690628f6325afc28c41230ceccce3613bf1b16a40db3898e81769242d688353027c922755c3a3023f9bedcac435867baf21b",
    "signer": "0x804Df1957AFd3D477CA130c7b52FECb0E2413520",
    "userId": "130290943"
  }
}