{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x90a80a7b2451ce0e014982689bf04acdfe794da6fc312fd5a01993e385d93b56",
    "signature": "0x80a8ec0810b4ea54a43e6e9b0dd6574b39c2a0ef3fc9e0353746c9c0f618227a0b8827fe81636de3f4d6386ea5e9fba1363b3c362e5c4b54748ac3e2682412ac1c",
    "signer": "0x7EFd3fe70f6C88cB44f7DdB8E5f6109E0D29cfda",
    "userId": "174240492"
  }
}