{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x00388fda1a66ed8c18f9333c17bf85609857acc87747d5ef106803c871d625ca",
    "signature": "0xd412bc4c28b8da0c197114eb7d4844e68b1ef8abca6355b81e257d74baf6ed0f06dc641781fbb4e1dbb87e37fd66e03b2b05c84f5165b7fe4ce9f6acd8de284d1b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}