{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x70ed541f07e73d514d6ca6762a5ed4668a3eaf6cb4edc33ec7da9858ce7daaa2",
    "signature": "0x83b09e89ade789ed1d8c84b3307e97cfd41734c7bab09495107594d5e89ea7591bda17a55ee289d307bf8a13fa211e9242747ef1381be461a7525f5bf09cb2b81c",
    "signer": "0x7d41964CE56dED229e127d097985ED9f17AFE229",
    "userId": "284013793"
  }
}