{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x40fee5cdad4f096701d7595727ae88fcf009863126df364ba7f6f1efac41a060",
    "signature": "0x999a3c6b188ecc0ba36be435c95ac73dcfd969757cd1bf0780f53c53bfbcddcb190bbf9c65e99d3a9f0a5d2c7122d9f3fd9ef669fd288f36c69a453356d17b0c1c",
    "signer": "0x01524AfC4E12B04B1DCc1aAd0B87D0c91a9bA0dA",
    "userId": "293163804"
  }
}