{
  "manageEntity": {
    "action": "Save",
    "entityId": "418892540",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9a5780fd3ce4097d5549af88395e8043aa3bef466f4a329e448092e075136744",
    "signature": "0x65afd2ef413f9e34735a07fc26c7274f217c923fc61f1b41ada970c76124d8ec0a81c8c505417fd6caf4e12f735a5ef1687e2cace4b91145d08426f26348743f1c",
    "signer": "0xC3F4365B505c2c0AECBaA66A7fDf3ba79a4b3B50",
    "userId": "311438"
  }
}