{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf6ab5a5e7ebe5b0d381f6ccf28a2cfe04f325e0c2241bfee9eaab8d4c6868a6a",
    "signature": "0x02a184257f1512d18f8d255b60015bb7d198f38a841f5e8eea89fd819a006b19714f944e2f297463ec7181f5754b7867ce0c0cf7d409cd10b2d0103c4ed76b9b1b",
    "signer": "0x647053e7d7A569aebB020C433b0FD5Ab5d0bb277",
    "userId": "257259514"
  }
}