{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd627dbc1e4b6e01c459373bc05158313351d2b75bc4c1b324474b905210fb713",
    "signature": "0xafc38ac7681473c64f3f23370684212518d1a1fb3cf475e50cb45a6bdb75918e7de442757dcf8b712f66c162d5bb691549a9bdaaa25f1a02ba72840d3e3296d01b",
    "signer": "0xf7aD967731Ff4B50Eb0128205CBD66c9f755C4bB",
    "userId": "467916987"
  }
}