{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfe7b7ed786d3300835a76b2813cd7e6e8b290e01c03be2fec281a2a2f1f37aca",
    "signature": "0x7e441e4a7fa1e023f081ae6147848de4305978fff55b9b4823f5a74c1f5e72313cd78c8344bd51adebb6ab73d263d16e6c500a21fabfdb167fb6cf59943138ad1b",
    "signer": "0xBF5C14482755C9f13F3edeBD86bC71f2BB8ae13a",
    "userId": "537050745"
  }
}