{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf9ba5f094fbb2d7d46c3a46106fdcb3cdb9ffef159cb308a8b15ce321e52519b",
    "signature": "0x81ae185143bd1d83ff0dc31ef6ac97769128ee145c16d855dda3d659dcac98e85d36196020905607c100f15cb5b073ffaa090488d684ee17f31e0b96cf6fe7bc1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}