{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x280582556411d3a2bc8adcdc285b73bbc39a96352cddcdfba4a0fa27f393d976",
    "signature": "0x5d44d9c916858ae90de7293acf2bbda8d0afde146f46dca8b9c5062fa1468b9938cb1d0a0f4ad4dd095cf3dee40c4fe7cd9b645ca062a5f0ab3a266557061a111b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}