{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x95d12c44c7cd8888227456de6616c6dab342b7f6006dc235ba478401cafd3bdf",
    "signature": "0xb2b3235738870e43129d44327e8ef158f488751ab495df81b8d42245a13cde927f8fbc912e28b0b14724a3219d77b80fb172f4783166917f2d538adbe112af881c",
    "signer": "0xd4172DACb313eb72C6Ee29bc685450908f4A1926",
    "userId": "407046354"
  }
}