{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8cfc0c45e146236266df2aa118365e5e637fb1b6bb7a4d9ccf60ddaa801d4f7b",
    "signature": "0x5e337ba9070513eea76f42e818cd86ce1f6cec17987647c04e6b28026106ea1f29b48e4951106b96375fc1c0929ac23f2836312bc83955edad015764ae804d881c",
    "signer": "0x4C92377d983252B7dc523E5805d67C584055803a",
    "userId": "588783054"
  }
}