{
  "manageEntity": {
    "action": "Save",
    "entityId": "1764903340",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3beff4705c4c5415cb07ffa5dd51025c4299bba1088199da05ed6ee1566cbc0d",
    "signature": "0x995f4978b2bdc15fece72670d092e4e3aaa1ebf1c15439aa1abd37f9211a7c717df3aedc41a47eb4a5fccb5784d7b3c8a4b60ed1ed179e0f9eb8bcda7836d9c31b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}