{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x511d5510fe1dec3f54b53ad76cb5c20e63df670c6534c15fb6ab07222d8ceb1e",
    "signature": "0x790f801d22a1606f2aae255ef57dd8dcfb52c63038d5f30c939e98c70238451d0123c5f2bf5a77f9c7334122c88f726b65b959a1366042f6a49cc7cc6cf8b0f91b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}