{
  "manageEntity": {
    "action": "Save",
    "entityId": "35711",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd42417fb0b7a010e2d2bbdeba479c225572ec82d2696da5e121ac85a9f5fb851",
    "signature": "0xe2b690c54d2ec7fdf0a61e1855a58d6b7375057de6601d1fc6bbfcbedd0449762c0632606716092af7daea6f76f848cbea0dbe050624a857ac1991a86c9c1cdb1c",
    "signer": "0x4477BfB16a41f0703acC6F4AC51e189Fda9d8F68",
    "userId": "139987211"
  }
}