{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa7c67a63c8d246bf329797c4a2bcdc2fa96f0327ab1f35d41fd500c15c9f8ff2",
    "signature": "0x365ab47314c3bdef882f63dee7defbefcef82290d9b4fd451900d739d41744dd7dabaa5d6e27c5a97ef99d2d3a4f67585528cdd56a96689cb3bfafd227eb5aac1b",
    "signer": "0x8B8094F1ebbB9F40884A6b5d932F7E821D519a9d",
    "userId": "172317106"
  }
}