{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbbf7fb189b3736b4399c774a98476fd328af451d8c9ee5e74630a8a878340a5a",
    "signature": "0x333477376c824be50b25bc43158634632a9803c49f4fc638df5008f6cd150cad5ab8d71333cc0d5c4fdd63c4caaddd8a2b6a23f7e26db87581fab004deb3f6531c",
    "signer": "0x4156998604759D925d749f871A51d24e25bF420A",
    "userId": "699215290"
  }
}