{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xeb6c3b67c640531c12073a7fd1070e9de4122493825030bfee794a78c031066b",
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    "signer": "0x7aB0E388CdD7CfDfF61F387e68b61be6E7471492",
    "userId": "668480302"
  }
}