{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x54260c52512c08b5b7a7b02b7cb027ce107f7a877e5711948743cf6e6548ebe4",
    "signature": "0x3d3a8bc98ac1f59a5b54ff509201b61e1055226209a8883cccc4381c745b71da1a9f4e489fee6beced33e64304fd44fd16ca0ba74c5b316e479c09dc6e94f7071c",
    "signer": "0x2230770EC85946F97685aDECD4b734f51662F050",
    "userId": "887741865"
  }
}