{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0b9c75806c9528bc79065cefde07dacbd3bf3b06feb5747551fcfe6fdd1905db",
    "signature": "0x0ce60c110a139066a8120f1a8b39bae126909cf07bf592504912fe486cc4c94136737168024baa14bfe8b873a8a5f937e28abd9a422c1ffd2d392478df361dc01c",
    "signer": "0x1B25b01159BD897158231C11bc7b64c61450E5F5",
    "userId": "752777935"
  }
}