{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x84bb72cbc7a48f1b9f0958f5da4d07d1f84d950e58a10ad4857d5fefc4a61f34",
    "signature": "0x58b4d1adfa45c0a329dabf4b8d6adc23bfb12ba53e7734f9d6cd7231a39e1dbf4f0b6f82520fbfc92d99bc5e8298d92b0f1422f7994bd664fb20b2e971ff20191c",
    "signer": "0x3f900FCC34Df497be04653343010288eaf3B190f",
    "userId": "877657773"
  }
}