{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa63ff8032ebf558387a64edd428c6401dd30e79c02af531e02163132b461d06f",
    "signature": "0x7b4397f9ed6bb5514bd1cfd31061250fcd2260d974874b869a184e265e16b7b6769c8d7a0d641b546010ed82859f9018b571243ef1a7353c4dced3860108c7121b",
    "signer": "0xCC0d2E17031Bb2a4822bc4c54ABE3a667ef3D494",
    "userId": "583264378"
  }
}