{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5c214c878be105f18c6318138be791326fc576f6b8774b1becfdbe3b4d794f8d",
    "signature": "0x387292f44c29ff784ec1f3fc440968ff092b71237d863e0b30e2b9e79cbf1f9e6a84fd126c07da29c38dffca40cc8c9337b950ac1152028c4d882d5b643e95441b",
    "signer": "0x3576236e7322E5B2F2bdeC4E6e89725094569eF3",
    "userId": "544633459"
  }
}