{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xaebfa1b1d3234a54ca1a4ff42c2011888477b0d0f35270d5c73e9d63789a453a",
    "signature": "0x923d63e777142dc7f9c43674c43d2627e2127af0f4dea3a7c8df8bafb972808179d0e6e2fb8f4db9679fe15927a6ddc7aa830c420754dc67403b8db476d243df1c",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}