{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x555356c5e1e2603ce336c1ae73a8c3e03c6e31a89d3530fb0b632d77fa1b878c",
    "signature": "0xd8daf3e5bed03195697fe765e6e4b1b42d23f31a46a4810d23905eebb25753fa0ea6a4458a0e0e8430246b1653b3ad319db30c9245f29d872037b8946e3769a01b",
    "signer": "0xB48f32921b2A08f9EA15eaF1d1DFc9A33087528a",
    "userId": "308321023"
  }
}