{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb88ac87137d1e4765d3c39521e27038829169a4fea16c87691e6da70498f91b4",
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    "signer": "0x0787f23963feA309FF6D58fCEB3aecb7Cc2785fa",
    "userId": "519102244"
  }
}