{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7335b0fef286fae643a6043021f201b66b5e7b1869bf1d5bf82b1585a74e6c98",
    "signature": "0xef5747bf1541b83db1ec07e7c0ba81d04fcce0e12c9e048d8a2323887d38841152ecbad8a7f5068864303b436aca5afe9593a3401dcbfd84f146ef006d1a315c1b",
    "signer": "0x6c5fAE3F9F4ecF2897DFFdc9Fd64EA7B2145a53f",
    "userId": "567122624"
  }
}