{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x15099c71f7784800a9d058ede5762fb4537aaa5c830b0285531538a25762be92",
    "signature": "0xa1bee67496b9ba13bed74da6eaee0a268a4143a06d51feec4729093a8845cb0b6a279afed01de2dcb40ce39a7d87b03df71d1bf47eda73ef4f0446100bf82af41c",
    "signer": "0xcc9cCc523005B394381478381D34DddB8558A28f",
    "userId": "957873025"
  }
}