{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x40c79684918555cf6f9e6c82a2d7f5e90fb6c3e7dae68821790902c483f4b253",
    "signature": "0x43286fa4cb7dcaeb647a41855ccd7cd57202aa83b6a5a705829d8b121ede81173b230b58e5d80dc6d18eb8483695d490788178424a8a3ddc9974981b6dc1cf0c1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}