{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xac3f56d58c08eccbbcd4250d34ccb832f7861d62a8dcc3712449484f822b3105",
    "signature": "0x607be19eeba8740cc5afa53977ea6406f1aee79c48525b8f4b383147832adf88306ed1e2174892549bde2e54560af869d0474a144ffd9e251d45ec987f96928c1c",
    "signer": "0x3760BfBe7C69EE333b09d46EF90bA86e14EF71b6",
    "userId": "193765969"
  }
}