{
  "manageEntity": {
    "action": "Save",
    "entityId": "1237836249",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8f8265201bfb02ee0ad38877ae3c961209b93d1b2663b04b8a0b89e60608f7f0",
    "signature": "0xc6df60f2853d855466b712d914517cf91cf1813231c3999f9756a69ca4fbe1b9463adccbdadf994f45dfdd6fc1ffda88020faa67c80e5d845b89b036990024491b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}