{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc71befc5769183c69b396c87bd88fa1069b5d23026b1baf32e538b0a75282c0d",
    "signature": "0x009750c361d50c2c81898dad86f84e258fd590d7155c5609d1be004049d25c1412c141dad534f0ab234c6c8fffb21ffc00a0821688451812b6071c9cb9af13e81c",
    "signer": "0x3cDab860Bfcc02BCDaa4624eA5C324B5e5D9f7A5",
    "userId": "370554049"
  }
}