{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6eabac1666f5dde9790530c9d729a930efeb234ffef65e689631ddd6f1463c97",
    "signature": "0x0704575e2a472843f0703adb2dedbe012cc929e99f3dee9d9210fde84e17cdf135103c936529e15184d70bd5d9a2641692b359b26022390d7e5e46f87fd8529a1c",
    "signer": "0xaAB075f1D622286f16eAf63179aa4157DafB1cDf",
    "userId": "850627398"
  }
}